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Croton glandulosus var. septentrionalis Müll.Arg.

United States, Texas, Grayson, Euphorbiaceae Grayson County: Ciaccio Sand Pit: sandy area in what was the old bed of the Red River, just south of current Red River channel, approx. 6.5 km (by air) ENE of Denison, north of Hwy 120. Found growing in desert-like sand pit with Solanum and Croton, ca. 3/4 m tall. 33° 46' 38" N 96' 18" W, 150m

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Chamaecrista fasciculata (Michx.) Greene

United States, Texas, Grayson, Ciaccio Sand Pit: sandy area in what was the old bed of the Red River, just south of current Red River Channel, approx. 6.5 km (by air) ENE of Denison, north of Hwy 120. Found growing in desert-like sand pit, ca. ½ m tall with bright yellow flowers and black pods. 33° 46' 38" N 96° 28' 18"W, 150m

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Croton capitatus var. capitatus Michx.

United States, Texas, Grayson, Ciaccio Sand Pit; sandy area in what was the old bed of the Red Rive, just south of current Red River channel, approx. 6.5 km (by air) ENE of Denison, north of Hwy 120. Found growing in desert-like sand pit where river used to flow with Solanum, ca. 1 ½ m tall. 33° 46' 38" N 96° 28' 18" W, 150m

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Glottidium vesicarium R. M. Harper

United States, Texas, Grayson, Northern part of county; along Shawnee Creek just upstream from where it empties into the Red River, just east of Denison Dam (which forms Lake Texoma) Growing in the crack of the kiamichi adjacent to the creek. Ca. 2 m tall with reddish orange flowers. Ca. 33° 48' N 96° 34' 12" W, 159m

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Lespedeza cuneata (Dum. Cours.) G. Don

United States, Texas, Grayson, Hagerman National Wildlife Refuge, ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) S of the Texas-Oklahoma state line. Sandy Access Area along Big Mineral Arm of Lake Texoma. Found growing in sand habitat along upper edge of beach at base of eroding bank with Chamaecrista and Sorghum, ca. 1 m tall with pale yellow flowers showing some purplish coloration. 33 degrees 45'32"N 96 degrees 47' 22" W, 190m

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Eupatorium serotinum Michx.

United States of America, Texas, Grayson, Northern part of country; edge of Red River near mouth of Shawnee creek, just east of Denison Dam (which forms Lake Texoma).; ; Approximately 1.5 m near stream bank near plants of equivalent size; Adequate space between other plants good exposure to sunlight; 0.75 m tall; inflorescences of white flowers.; ; ca. 33° 49' 11'' N 96° 34' W; ; Elevation: ca. 155 m, 155m

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Lippia nodiflora (L.) Michx.

United States, Texas, Grayson, Nothern part of county; along Shawnee Creek just upstream from where it empties into the Red River, just east of the Denison Dam (which forms Lake Texoma). Located in a weedy, rocky area near the margin of the creek with Eupatorium coelestinum and Eupatorium perfoliatum. Plants herbaceous ca. 20 m tall and the flowers are white. ca. 33° 48' 45" N 96° 34' 12" W, 159m

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Rhus glabra L.

United States, Texas, Grayson, Ciaccio Sand Pit: sandy area in what was the old bed of the Red River, just south of current Red River channel, approx. 6.5 km (by air) ENE of Denison, north of Hwy 120. Found growing on bank of desert-like sand pit, ca. 2 1/2 to 3 m tall with deep red fruits. 33° 46' 38" N 96° 28' 18" W, 150m

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Sophora affinis Torr. & Gray

United States, Texas, Grayson, Hagerman National Wildlife Refuge, Ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) S of the Texas-Oklahoma state line. Just inside east boundary of refuge, off Refuge Road (inside gate where Refuge Road takes a 90" turn to the north). Tree was located in sandy soil at the edge of woods on bluff above Lake Texoma. DBH was approximately 10 inches. Fruits were black, round, constricted and dangled. Quercus stellata) and Eastern Red Cedar (Juniperus virginiana). ca. 33° 44' 3" N 96° 44' 51", 195m

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Baccharis neglecta Britt.

United States, Texas, Grayson, Northern part of county; along Shawnee Creek just upstream from where it empties into the Red River, just east of Denison Dam (which forms Lake Texoma). Plant was growing on exposed area of Duck Creek on limestone. The shrub was woody and approximately 11 feet tall. Mikania scandens) and Marsh Elder (Iva annua). ca. 33° 448' 57" N 96° 33' 33" W, 159m

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Mikania scandens (L.) Willd.

United States, Texas, Grayson, Northern part of county; along Shawnee Creek just upstream from where it empties into the Red River, just east of Denison Dam (which forms Lake Texoma). Located growing beside a creek in kiamichi soil. Plant was climbing on Willow (Salix) and Typha (Typhaceae). Baccharis neglecta), Marsh Elder (Iva annua), and Eupatorium coelestinum. ca. 33DEG 48' 57" N 96DEG 33' 33" W, 159m

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Ilex decidua Walter

United States, Texas, Grayson, McCarley Woods Preserve, approximately 8 km E of downtown Sherman just S of Hwy 56. Accessed by turning S on small county road immediately E of where Choctaw Creek crosses Hwy 56. The preserve is on the left of this small road approximately 0.5 km S of Hwy 56. Plant was a small tree with bright red fruits growing along a fence row in a native blackland prairie ecosystem. Cornus), Virginia Cedar (Juniperus virginiana), Poison Ivy (Toxicodendron radicans), and Rattan vine (Berchemia scandens). ca. 33° 37' 49 N 96° 29' 32" W, 183m

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Lespedeza cuneata (Dum. Cours.) G. Don

United States, Texas, Grayson, Hagerman National Wildlife Refuge, ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) S of the Texas-Oklahoma state line. Just inside east boundary of Refuge, off Refuge Road (inside gate where Refuge Road takes a 90° turn to the north). Plant is less than 1 foot tall. Grows in a disturbed environment in sandy soil near a woody roadside area. Fruits stick out at stem and are 2.5 to 3 mm long. Leaflets are 1 to 2 cm. Larger leaflets are truncate or notched. Ca. 33°44'3"N 96°44'51"W., 195m

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Juniperus virginiana L.

United States, Texas, Grayson, Herman Baker Park, 5 km (by road) SE of downtown Sherman, ca 1.6 km S of Hwy 56. Along trail around Pickens Lake. A juniper growing with Eastern red cedar, cedar elm, Berchemia scandens, Lonicera maackii and Frangula caroliniana along pathway at the edge of the woods with blue berries. It is 8 in. dbh and has a vine climbing it. ca. 33 37' 12" N 96 37' 58" W, 220m

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Frangula caroliniana (Walter) A. Gray

United States, Texas, Grayson, Herman Baker Park, 5 km (by road) SE of downtown Sherman, ca. 1.6 km S of Hwy 56. Along trail around Pickens Lake. A small understory tree growing with Eastern red cedar, cedar elm, Berchemia scandens, Juniperus virginiana and Lonicera maackii along pathway at the edge of the woods with red berries. Ca. 33° 37' 12" N 96° 37' 58" W, 220m

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Heliotropium tenellum (Nutt.) Torr.

United States, Texas, Grayson, Ciaccio Sand Pit; sandy area in what was the old bed of the Red River, just south of current Red River channel, approx. 6.5 km (by air) ENE of Denison, north of Hwy 120. Open area of loose sand growing with a Euphorbeaceae. Ca. 0.5m tall with white flowers and tiny irritating hairs on plant. Ca. 33° 38" N 96° 28' 18" W. Elevation: .ca 150 m

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Eupatorium coelestinum L.

United States, Texas, Grayson, Northern part of county; along Shawnee Creek just upstream from where it empties into the Red River, just east of Denison Dam (which forms Lake Texoma). Growing in open weedy area in wet shallow soil on kiamichi near cattails and plucheas. Purplish blue flower ca 0.5-0.75 m tall. Ca. 33°48' N 96° 34' 12" W, 159m

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Frangula caroliniana (Walter) A. Gray

United States, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake road); ca. 2.5 km (by air) SW of Downtown Denison. Open, sandy, edge along creek with Carya texana, Morus rubra, Viburnum rufidulum, and Acer negundo. Understudy shrub, ca. 3 to 4 m tall. Fruits ca. 0.5 to 1 cm in diameter, reddish pink turning to black. 33°44'14" N96°34'10" W, 210m

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Eupatorium serotinum Michx.

United States, Texas, Grayson, Buckner Biological Preserve and Research Area. Northeastern Grayson County, off Dripping Springs Road, approximately 8.5 miles (13.7 km) by road from Austin College Campus (Sherman). Deep, sandy soil. Growing in small prairie remnant/succesional area. Growing with Agalanis herterophylla, Rotala ramosior, Schizachyrium scoparium, and Paspalum sp. Herbaceous. Ca. 3 to 5 m tall. 33° 41' N 96° 30' W, 180m

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Rotala ramosior (L.) Koehne

United States, Texas, Grayson, Buckner Biological Preserve and Research Area. Northeastern Grayson County, off Dripping Springs Road, approximately 8.5 miles (13.7 km) by road from Austin College Campus (Sherman). Deep, sandy soil. Growing in small prairie remnant/succesional area. Growing with Agalanis heterophylla, Eupatorium scrotinum, Schizachyrium scoparium and Paspalum sp. Herbaceous. Ca. to 0.5 m tall. 33° 41' N 96° 30' W, 180m

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Scabiosa atropurpurea L.

United States, Texas, Hunt, 10 mi East of Greenville Hwy 30 Service Divide. Hard Packed Clay.

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Scabiosa atropurpurea L.

United States, Texas, Hunt, 10 mi East of Greenville, Hwy 30 in service divide.

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Bothriochloa ischaemum (L.) Keng

United States, Texas, Montague, J.A. Brite Ranch. Hwy 59 ca 2.6 mi SW of Bowie. SW corner of property. Private ranchland. Western Cross Timbers, Post Oak/Blackjack Oak woodlands. Dappled to partial sun. Bonti-Exray Complex Soil Series. Rocky outcrop at top of slope. Sandy loam in cracks of or built up on large sandstone conglomerate boulders, ±20 m, WGS 1984, 288 - 308m

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Heterotheca stenophylla var. angustifolia (Rydb.) Semple

United States of America, Texas, Tarrant, Arlington: Southwest Nature Preserve; N 32.66460°, W 097.21932°; el. 640 ft.; with Bob O'Kennon (BRIT); Yucca Meadow; open sandy area; deep sand; flowers yellow; very local herb; uncommon; perennial; stiffleaf false goldenaster

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United States of America, Texas, Tarrant, Arlington: Southwest Nature Preserve; ; N 32.66316°, W 097.21975°; elev. 652 ft.; along trail to Yucca Meadow; open sandy areas; disk flowers purple-brown, ray flowers partly red; occasional herb; perennial., 199m

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Eragrostis superba Peyr.

United States of America, Texas, Tarrant, Arlington: Southwest Nature Preserve; N 32.66558°, W 097.22306°; el. 578 ft.; with Bob O'Kennon (BRIT); sandstone iron dome; very deep sandy soils; small pond & environs; fertile herb; occasional; perennial; William's lovegrass

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Juniperus virginiana L.

United States of America, Texas, Grayson, Evergreen tree 15 ft. high; 8 inches in diameter; bark shreddy; berries light gray-blue. Post Oak Belt, 3 miles north of Gordonville at Cedar Bayou on Lake Texoma; sandy soil.

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Juniperus virginiana L.

United States, Texas, Grayson, 3 miles north of Gordonville at Cedar Bayou on Lake Texoma.

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Juniperus virginiana L.

United States, Texas, Grayson, 3 miles north of Gordonville at Cedar Bayou on Lake Texoma.

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Juniperus virginiana L.

United States, Texas, Grayson, 3 miles north of Gordonville at Cedar Bayou on Lake Texoma.

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Cornus drummondii C. A. Mey.

United States, Texas, Grayson, Hagerman National Wildlife Refuge, ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) S of the Texas-Oklahoma state line. Just inside east boundary of Refuge, off Refuge Road (inside gate where Refuge Road takes a 90° turn to the north). Shrub about 8-9 feet tall with white berry and red stems. Habitat is an open weedy area invaded by wooded ca. 33°44'3" N 96°44'51'., 196m

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Ligustrum sinense Lour.

United States of America, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air SW of downtown Denison.; Shrub found at the edge of Lake Waterloo, near Quercus shumardii and Carya tomentosa. Simple, pinnately compound leaflets ranging from 1 to 5 cm in length. Small greenish brown fruits grouped in clusters of 15 to 20 fruits, about 2 mm in diameter each.; Ca. 33° 44' 14" N 96° 34' 10" W; Elevation: ca. 210 m, 210m

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Eryngium leavenworthii Torr. & A. Gray

United States, Texas, Grayson, Northern part of county; along Shawnee Creek just upstream from where it empties into the Red River, just east of Denison Dam (which forms Lake Texoma). Growing in a weedy, disturbed area. About 1.5 feet tall. Inflorescences are purplish-blue; 2 to 6 cm including bract. Purple, leafy bracts on the apical end of inflorescences; pollinated by bees. Stamens are blue. Spiny leaves no longer than 5 cm. CA. 33° 49' 7" N 96° 33' 26" W, 159m

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Acer negundo L.

United States, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of downtown Denison. Found by Lake Waterloo alongside Quercus shumardii and Carya tomentosa. DBH is approximately 1 foot; tree approximately 40 feet tall. Specimen is the only maple in the area. Leaves range from 4 cm to 9 cm; olive green in color. Leaves opposite and has 3 to 5 leaflets; pinnately compound. Winged, light green fruits (samaras) average length of 3.5 cm. Ca. 33° 44' 14" N 96° 34' 10 " W, 210m

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Quercus muehlenbergii Engelm.

United States, Texas, Grayson, Herman Baker Park, 5 km (by road) SE of downtown Sherman, ca. 1.6 km S of Hwy 56. Along trail around Pickens Lake. Growing on exposed Austin Chalk layer. Tree. Oak family. 35-40 ft, tall, 12 inches DBH. Oblong toothed leaves, 20-25 mm petioles. Growing with Eastern Red Cedar and Q. buckleyi. ca. 33° 37' 12" N 96° 37' 58" W, 220m

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Ilex decidua Walter

United States, Texas, Grayson, McCarley Woods Preserve, approximately 8 km E of downtown Sherman just S of Hwy 56. Accessed by turning S on small county road immediately E of where Choctaw Creek crosses Hwy 56. The preserve is on the left of this small road approximately 0.5 km S of Hwy 56. Black land prairie ecosystem. Small tree. 10-12 ft. tall. Bright red fruit. Oblong leaves. Alternate leaves growing from nodes. Oblong/elliptic leaves. Growing with Eastern Redwood, poison ivy, and B. scandens. ca. 33° 37' 49" N 96° 29' 32" W, 183m

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Berchemia scandens (Hill) K. Koch

United States, Texas, Grayson, McCarley Woods Preserve, approximately 8 km E of downtown Sherman just S of Hwy 56. Accessed by turning S on small county road immediately E of where Choctaw Creek crosses Hwy 56. The preserve is on The left of this small road approximately 0.5 km S of Hwy 56. Black land prairie ecosystem. High climbing twinging vine. Growing on dogwood tree around fence line. Blue fruits. Oblong/elliptic leaves. Growing with Eastern Redwood and poison ivy. ca. 33° 37' 49" N. 96° 29' 32" W, 183m

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Baccharis texana (Torr. & Gray) Gray

United States, Texas, Grayson, Northern part of county, prairie remnant just west of Randall Lake dam, ca. 2 km SW of Denison Dam. Exposed area of limestone above creek. Woody shrub. 11 ft. tall. Toothed oval leaves, Alternate leaves. White flowers. ca. 33° 48' 14" N 96° 34' 49" W, 190m

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Eupatorium rugosum H.B. & K.

United States, Texas, Grayson, Northern part of county; Loy Lake Park, ca. 7 km (by road) N of Hwy. 82, near Loy Lake exit off of Hwy. 75, ca. 5.6 km (by air) SW of downtown Denison. Along Loy Lake just above water level. White flowers, ca. 3-4 ft tall. Leaves opposite and deltoid, teethed leaves. Growing along with cat tails and willow trees along the lake. ca. 33° 43' 55" N 96° 35' 44" W, 210m

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Eupatorium perfoliatum L.

United States, Texas, Grayson, Northern part of county; along Shawnee Creek just upstream from where it empties into the Red River, just east of Denison Dam (which forms Lake Texoma). Rocky, disturbed area near margin of the creek. Flowers white and plant is ca 1-1.5 m tall. Ca. 33° 48' N 96° 34' 12" W, 159m

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Dalea lanata Spreng.

United States, Texas, Grayson, Ciaccio Sand Pit; sandy area in what was the old bed of the Red River, just south of current Red River channel, approximately 6.5 km (by air) ENE of Denison, north of Hwy 120. Open loose, sandy, weedy with plants of the Xanthium and Capparaceae family. Flowers purple and plant grows low to the ground. Prostrate with branches ascending. Ca. 33o 38"N 96o 28' 18"W, 150m

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Eupatorium serotinum Michx.

United States of America, Texas, Grayson, Northern part of county; Loy Lake Park, just off Loy Lake Road, ca. 7 km (by road) N of Hwy. 82, near Loy Lake exit off of Hwy 75, ca. 5.6 km (by air) SW of downtown Denison. Growing near lake, associates with Glottidium vesicarium. White inflorescences. 3-4ft tall. ca. 33° 43' 55" N 96° 35 44" W Elevation 210 m, 210m

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Ambrosia psilostachya DC.

United States, Texas, Grayson, Hagerman National Wildlife Refuge, ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) Sof the Texas-Oklahoma state line. Just inside eastern boundary of Refuge, off Refuge Road (inside gate where Refuge Road takes a 90° turn to the north). Growing along the fence line in a weedy area near margin of pasture and prairie remnant. Growing with Bothriochioa ischaemum, Aristida, and Panicum virgatum. Commonly known as Western Ragweed or Perennial Ragweed. Often found in disturbed areas throughout Texas. Plants ⁓ 1' tall. ca. 33° 44' 3" N 96° 44' 51", 195m

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Croton capitatus Michx.

United States, Texas, Grayson, Hagerman National wildlife Refuge, ca. 18 km (by air) NW of Sherman; ca 16 km (by air) S of the Texas-Oklahoma state line. Just inside east boundary of Refuge, off Refuge Road (inside gate where Refuge Road takes a 90° turn to the north). Growing in a weedy semi-open area invaded by trees, including Ulmus crassifolia, and Gleditsia triacanthos. Also growing near No. 20, Ambrosia trifida, and Sorghum halepense. Plant varies in height from 1 1/2' to 3' tall. Commonly called Woolly Croton or Hogwort. ca 33° 44' 3" N 96° 44' 51", 195m

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Albizia julibrissin Durazz.

United States, Texas, Grayson, Fabaceae Grayson County: Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of downtown Denison. Small understory tree approximately 6 to 8 m tall with twice pinnately compound leaves. Leaves are 25 to 30 cm long and divided into 6 to 12 pairs of pinnae, each with 20 to 25 leaflets. Fruit is a flat brown pod 8 to 13 cm long. Found by Lake Waterloo; fossils found nearby. Area has a lot of iron ore. Ca. 33° 44' 14" N 96° 34' 10" W, 210m

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Clematis terniflora DC.

United States, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of Downtown Denison. Plant was a vine climbing up a hackberry (Celtis). Fruit was white and feathery. Flowers were white with a sweet smell. Found at the junderstory edge of creek bottom in cross timbers forest. 33° 44' 14"N 96° 34' 10" W, 210m

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Cornus drummondii C. A. Mey.

United States, Texas, Grayson, GRAYSON County: Hagerman National Wildlife Refuge, Ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) S of the Texas-Oklahoma state line. Just inside east boundary of Refuge, off Refuge Road (inside gate where Refuge Road takes a 90° turn to the north). Growing in a weedy semi-open area invaded by woody vegetation, including Ulmus crassifolia, Prosopis glandulosa, and Celtis. Plant a shrub ~8'-9' tall. Red stalks hold white fruits. Commonly referred to as Rough-Leaf Dogwood. ca. 33° 44' 3" N 96° 44' ca. 195 m, 195m

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Quercus muehlenbergii Engelm.

United States of America, Texas, Grayson, Herman Baker Park, 5 km (by road) SE of downtown Sherman, ca. 1.6 km S of Hwy 56. Along trial around Pickens Lake.; DBH 10 inches. ; DBH 10 inches. Growing on a slope with Quercus shumardii and Juniper. Brown acorn.; ca. 33° 37' 12" N 96° 37' 58" W; Elevation 220 m, 220m

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Eupatorium altissimum L.

United States, Texas, Grayson, Herman Baker Park, 5 km (by road) SE of downtown Sherman, ca. 1.6 km S of Hwy. 56. Along trail around Pickens Lake. Found growing in a weedy area with Little Blue Stem. White corollas. ca. 33° 37' 12" N 96° 37' 58" W, 220m

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Polygonum amphibium L.

United States, Texas, Grayson, Northern part of county; Loy Lake Park, just off Loy Lake Road, ca. 7 km (by road) N of Hwy. 82, near Loy Lake exit off of Hwy 75, ca. 5.6 km (by air) SW of downtown Denison. Found growing near lake bed. Deep pink flowers. Growing with button bush. ca. 33°43'55"N 96°3544"W., 210m

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Quercus stellata Wangenh.

United States of America, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of Downtown Denison.; Found growing in woodlot at the edge of the eastern cross timbers. Green acorns. DBH, 2 ft.; ca. 33° 44' 14" N 96° 34' 10" W; Elevation 210 m, 210m

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Galactia volubilis (L.) Britton

United States, Texas, Grayson, Northern Part of county; along Shawnee Creek just upstream from where it empties into Red River just east of Denison Dam (which forms Lake Texoma). Low drainage area, muddy to wet creek bed. Pink flowers. Big bean fruits. Found growing with Baccharis neglecta. 33 degrees 44' 14" N 96degrees 34'10" W, 159m

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Acer negundo L.

United States, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of Downtown Denison. Edge of the Waterloo creek. Tree, Box elder, Maple family, ca. 1 ft. DBH; ca. 40 ft. tall 3 leaflets per leaf. Elliptical leaf. Wind dispersed. Dark green leaflets, seeds are olive color. Growing with Shumar Red Oak and Texas Hickory. ca. 33° 44' 14" N 96° 34' 10" W, 210m

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Ligustrum japonicum Thunb.

United States, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy. 82, at end of Park St. (a small dead-end street off Loy Lake Road); ca. 2.5 km (by air) SW of downtown Denison. Edge of the Waterloo Creek. Shrub with multiple trunks, ca. 1.5 ft. tall. Glabrous leaves, Olive family, growing along with pecan trees. ca. 33° 44' 14" N 96°34' 10" W, 210m

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Mikania scandens (L.) Willd.

United States, Texas, Grayson, Northern part of county, prairie remnant just west of Randall Lake dam, ca 2 km SW of Denison Dam. Clay soil near the duck creek rock layer. Vine. White flowers. Deltoid with evenly loved leaves. Serrated leaves. Climbing on willows and cattails. Growing with E. coelestinum and I. annua. ca 33° 48' 24" N. 96° 34' 49" W, 190m

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Eupatorium coelestinum L.

United States, Texas, Grayson, Northern part of county, prairie remnant just west of Randall Lake dam, ca. 2 km SW of Denison Dam. Clay soil near the duck creek rock layer. Blue flower. Crawling herb. Deltoid toothed leaves. Growing with I. annua and M. scandens. ca. 33° 48' 14" N 96° 34' 49" W, 190m

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Lippia nodiflora (L.) Michx.

United States, Texas, Grayson, Northern part of county, prairie remnant just west of Randall Lake dam, ca. 2 km SW of Denison Dam. Weedy disturbed area on high bank near Red River. Tiny white flowers. 1 ft. trailing. Lobed opposite leaves, toothed leaves. Growing with poison ivy and P. dotacandra. ca. 33° 48' 14" N 96° 34' 49" W, 190m

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Chamaecrista fasciculata (Michx.) Greene

United States, Texas, Grayson, Northern part of county, prairie remnant just west of Randall Lake dam, ca. 2 km SW of Denison Dam. Weedy disturbed area on high bank near Red River. Yellow flowers. 1-1 1/2 ft. tall. Opposite twice connately leaves. Legume beans. Growing with poison ivy and P. dotacandra ca. 33° 48' 14" N 96° 34' 49" W, 190m

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Arundo donax L.

United States, Texas, Grayson, Ciacco Sand Pit; sandy area in what was the old bed of the Red River, just south of the current Red River channel, approximately 6.5 km (by air) ENE of Denison, north of Hwy. 120. Collected from sand pits along Red River. Growing with Fraxinus pennsylvanica, Ambrosia trifolia, Funsastrum cynanchoides, and Ampelopsis arborea. 33° 46' 38" N 96° 28' 18" W Herbaceous, ca. 5m tall., 150m

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Funastrum cynanchoides (Decne.) Schltr.

United States, Texas, Grayson, Ciaccio Sand Pit; sandy area in what was the old bed of the Red River, just south of current Red River channel, approx. 6.5 km (by air) ENE of Denison, north of Hwy 120. Collected from sand pits along Red River. Growing with Fraxinus pennsylvanica, Ambrosia trifolia, Arundo donax, and Ampelopsis arborea. Twining vine. 33° 46' 38" N 96° 28' 18" W, 150m

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Callicarpa americana Lour.

United States, Texas, Grayson, Buckner Biological Preserve and Research Area. Northeastern Grayson County, off Dripping Springs Road, approximately 8.5 miles (13.7 km) by road from Austin College Campus (Sherman). Understory shrub around 2 m tall. Growing with Vitis sp, Juniperus virginiana, Parthenocissus quinquefolia, and Quercus stellata. Aromatic. Fruits purple. Ca. 33°41'N 96°30'W., 180m

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Quercus shumardii Buckley

United States of America, Texas, Grayson, Herman Baker Park, 5 km (by road) SE of downtown Sherman, ca. 1.36 km S of Hwy. 56.; Along trail around Pickens Lake. Growing with Quercus muehlenbergii, Juniperus virginiana, and Celtis laevigata.; Woody, ca. to 20 m tall. Foliage size extremely variable.; Elevation: ca. 200 m 33° 37' 12" N 96° 37' 58" W 17 Oct. 2007, 200m

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Quercus muehlenbergii Engelm.

United States, Texas, Grayson, Herman Baker Park, 5 km (by road) SE of downtown Sherman, ca. 1.6 km S of Hwy. 56. Along trail around Pickens Lake. Growing with Quercus shumardii, Juniperus virginiana, and Celtis laevigata. Woody, ca. to 20 m tall. Foliage size extremely variable. 33° 37' 12" N 96° 37' 58" W., 220m

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Callicarpa americana Lour.

United States, Texas, Grayson, Buckner Biological Preserve and Research Area. Northern Grayson County, off Dripping Springs Road, approximately 8.5 miles by road from Austin College Campus (Sherman). Located in a cross timbers forest near exposed ridge with Fagaceae sp. Plants herbaceous, ca. 2-3 m tall with several purple, beady fruits. ca. 33° 41' N 96° 30' W, 180m

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Solanum rostratum Dunal

United States, Texas, Grayson, Hagerman National Wildlife Refuge, Ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) S of the Texas-Oklahoma state line. Just inside east boundary of Refuge, off Refuge Road (inside gate where Refuge Road takes a 90° turn to the north). Collected from recently inundated area, no living understory 0.5 m tall. ca. 33° 43' 39" N 96° 44' 53", 195m

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Ligustrum sinense Lour.

United States of America, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy. 82 at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km by air) SW of downtown Denison.; Edge of mixed deciduous woods near creek with Vitus sp, Carya illinoensis, and Lonicera japonica. Woody around 5 m tall with shiny leaves and vine-like stems.; Elevation: ca. 210 m.; 33° 44' 14" N, 96° 34' 10" W., 210m

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Acer negundo L.

United States, Texas, Grayson, Around Waterloos Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of Downtown Denison. Edge of mixed deciduous woods near native creek with Vitus sp, Morus sp, and Maclura pomifera. The DBH about 5 in. 33° 44' 14" N 96° 34' 10" W, 210m

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Eupatorium serotinum Michx.

United States, Texas, Grayson, Buckner Biological Preserve and Research Area. Northeastern Grayson County, off Dripping Springs Road, approximately 8.5 miles (13.7 km) by road from Austin College Campus (Sherman). Surrounded by undergrowth with Agalinis heterophylla and Schizachyrium scoparium. About 2 m tall. Flowers white with a discoid head. ca. 33° 41' N 96° 30' W, 180m

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Ligustrum sinense Lour.

United States, Texas, Grayson, Buckner Biological Preserve and Research Area. Northern Grayson County, off Dripping Springs Road, approximately 8.5 miles by Road from Austin College Campus (Sherman). Located in a woody pine trail near the road with Juniperus sp. and Mimosa sp. Plants herbaceous ca. 4 m with green berries. ca. 33° 41' N 96° 30' W., 180m

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Lonicera maackii (Rupr.) Maxim.

United States, Texas, Grayson, Herman Baker Park, 5 km (by road) SE of downtown Sherman, ca. 1.6 km S of Hwy 56. Located at the edge of the woods with Ulmus crassifolia, Frangula carliniana, Berchemia scandens, and Juniperus virginiana. The plant is a short tree ca. 2 m tall with red berries. 32° 37 '12" N 96° 37' 58" W, 220m

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Euphorbia hexagona Nutt. ex Spreng.

United States, Texas, Grayson, Ciaccio Sand Pit; sandy area in what was the old bed of the Red River, just south of current Red River channel, approx. 6.5 km (by air) ENE of Denison, north of Hwy 120. Located in an open weedy area with loose sand on the dry Red River bed. It is found with Croton capitatus var. capitatus. Plants herbaceous ca. 0.50 m tall. 33° 46' 38" N 96° 28' 18" W, 150m

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Dalea lanata Spreng.

United States of America, Texas, Grayson, Ciaccio Sand Pit; sandy area in what was the old bed of the Red River, just south of current Red River channel, approx. 6.5 km (by air) ENE of Denison, north of Hwy 120. Located in an open weedy area with loose sand on the dry Red River bed. It is found with Xanthium sp. and Polanasia dodecandra. Plants herbaceous, prostrate on the sand and with small, violet flowers.; 33° 46' 38" N 96° 28' 18" W; Elevation: ca. 150 m., 150m

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Croton capitatus var. capitatus Michx.

United States, Texas, Grayson, Ciaccio Sand Pit; sandy area in what was the old bed of the Red River, just south of current Red River channel, approx. 6.5 km (by air) ENE of Denison, north of Hwy 120. Located in an open weedy area with loose sand on the dry Red River bed. It is found with Euphorbia hexagona. Plants herbaceous ca. 0.50 m tall. 33° 46' 38" N 96° 28' 18" W, 150m

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Chamaecrista fasciculata (Michx.) Greene

United States, Texas, Grayson, Northern part of county; along Shawnee Creek just upstream from where it empties into the Red River, just east of Denison Dam (which forms Lake Texoma). Growing in disturded rocky area near bank of Red River near a variety of other species, including Eryngium leacenworthii and number 12. Yellow flowers; looking down the middle of the flower the color is a deep purple/brown. ~1' to 1 1/2' tall. Commonly called Bellflower or Prairie Senna. ca. 33° 49' 7" N 96° 33' 26" W, 159m

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Eryngium leavenworthii Torr. & A. Gray

United States, Texas, Grayson, Northern part of county; along Shawnee Creek just upstream from where it empties into the Red River, just east of Denison Dam (which forms Lake Texoma). Growing in disturbed rocky area near bank of Red River near a variety of other species, including numbers 11 and 12. Purple bracts and inflorescences; blue stamens; erect -2-3' tall. ca. 33o 49' 7" N. 96o 33' 26" W., 159m

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Clematis terniflora DC.

United States, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of Downtown Denison Growing a few feet from the edge of a cross-timbers forest. Growing near Quercus shumardii, Quercus stellata, Ulmus spp, and Quercus lyrata. High climbing vine with a sweet odor. 33° 44' 14" N 96° 34' 10" W, 210m

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Albizia julibrissin Durazz.

United States, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of Downtown Denison. 33° 44' 14" N 96° 34 10" W., 210m

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Acer negundo L.

United States, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of Downtown Denison Growing a few feet from the edge of a cross-timbers forest. Growing near Quercus shumardii, Ulmus spp, and Quercus lyrata. Tree ~36' tall, DBH 12". Commonly referred to as Box-Elder or Ash-Leaf Maple. Often found in stream banks. Most common Acer in ne TX. 33° 44' 14" N 96° 34' 10" W, 210m

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Frangula caroliniana (Walter) A. Gray

United States, Texas, Grayson, Around Waterloo Lake, ca. 10 km (by road) N of Hwy 82, at end of Park St. (a small dead end street off Loy Lake Road); ca. 2.5 km (by air) SW of Downtown Denison Growing at the edge of the creek near the margin of Post Oak forest with Ulmus spp, Quercus stellata, Carya texana, and Juniperus virginiana. Plant a small, understory tree, 6' tall, 2" in diameter. Small, red fruits 5 mm in diameter. Commonly known as Carolina Buckthorn. ca. 33° 44' 14" N 96° 34' 10" W, 210m

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Eupatorium perfoliatum L.

United States, Texas, Grayson, Northern part of county; Loy Lake Park, just off Loy Lake Road, ca. 7 km (by road) N of Hwy. 82, near Loy Lake exit off of Hwy 75, ca. 5.6 km (by air) SW of downtown Denison. Growing a few feet from the edge of Loy Lake with Ambrosia artemisiifolia, Polygonum lapathifolium, and Pluchea odorata. Plant ~4' tall. Commonly known as boneset, throughwort, and agueweed. Usually found in drainage areas. ca. 33° 43' 55" N 96° 35' 44" W, 210m

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Pluchea odorata (L.) Cass.

United States, Texas, Grayson, Northern part of county; Loy Lake Park, just off Loy Lake Road, ca. 7 km (by road) N of Hwy. 82, near Loy Lake exit off of Hwy 75, ca. 5.6 km (by air) SW of downtown Denison. Growing a few feet from the edge of Loy Lake with Ambrosia artemisiifolia, Polygonum lapathifolium, and Eupatorium perfoliatum. Plant ~1' to 1 1/2' tall. Flower: fuchsia in color. Commonly known as canela and purple pluchea. Often found in areas of low drainage. ca. 33°43'55"N 96°3544"W., 210m

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Ambrosia trifida L.

United States of America, Texas, Grayson, Hagerman National Wildlife Refuge, Ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) S of the Texas-Oklahoma state line. Just inside east boundary of Refuge, off Refuge Road (inside gate where Refuge Road takes a 90° turn to the north).; Growing in a weedy semi-open area invaded by trees, including Ulmus crassifolia, and Gleditsia triacanthos. Also growing near No. 20.; Plant ~3' tall, but other individuals of varied height. Commonly referred to as Blood Ragweed or Giant Ragweed.; ca. 33° 44' 3" N 96° 44' 51'; Elevation: ca. 195 m, 195m

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Euphorbia bicolor Engelm. & A. Gray

United States, Texas, Grayson, Hagerman National Wildlife Refuge, Ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) S of the Texas -Oklahoma state line. Just inside east boundary of Refuge, off Refuge road (inside gate where Refuge Road takes a 90° turn to the north). Growing in a weedy semi-open area invaded by trees, including Ulmus crassifolia, and Gleditsia triacanthos. Also growing near Ambrosia trifida. Plant ~2 1/2' tall; microscopic flowers; white bracts; milky sap. Commonly known as Snow-on-the-Prairie. ca. 33°44'3" N96°44' ca. 195 m, 195m

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Cardiospermum halicacabum L.

United States, Texas, Grayson, Hagerman National Wildlife Refuge, ca. 18 km (by air) NW of Sherman; ca. 16 km (by air) S of the Texas-Oklahoma state line. Just inside east boundary of Refuge, off Refuge Road (inside gate where Refuge Road takes a 90° turn to the north). Growing in a semi-wet area of a partially drained pond. Growing near Iva spp, Ambrosia spp, and Sorghum halepense. Plant is herbaceous, sprawling vine growing over other plants; has tendrils; hollow fruit with seeds within; seeds 5 mm in diameter, black at maturity with lighter tissue attaching them to the fruit. Ca. 33° 44' 3" N 96° 44' 51" W, 195m

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Ilex decidua Walter

United States, Texas, Grayson, McCarley Woods Preserve, approximately 8 km E of downtown Sherman just S of Hwy 56. Accessed by turning S on small county road immediately E of where Choctaw Creek crosses Hwy 56. The preserve is on the left of this small road approximately 0.5 km S of Hwy 56. Growing along a fence line near Zanthoxylum clava-herculis, Juniperus virginiania, Cornus, and Toxicodendron radicans. Shrub; ~9-10' tall; bright red fruits 5mm in diameter. Commonly known as Holly. ca. 33° 37' 49" N 96° 29' 32" W, 183m

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Rumex crispus L.

United States, Texas, Ellis, Stream bottom 3.3 miles northeast of Italy, TX.

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Rumex crispus L.

United States, Texas, Ellis, Stream bottom 3.3 miles northeast of Italy, TX.

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Rumex crispus L.

United States, Texas, Ellis, Stream bottom 3.3 miles northeast of Italy, TX.

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Rumex altissimus Alph. Wood

United States, Texas, Cooke, North of Gainesville, west of Highway 77 at Red River bridge

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Rumex altissimus Alph. Wood

United States, Texas, Cooke, North of Gainesville, west of Highway 77 at Red River bridge

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Rumex altissimus Alph. Wood

United States, Texas, Cooke, North of Gainesville, west of Highway 77 at Red River bridge

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Rumex altissimus Alph. Wood

United States, Texas, Cooke, North of Gainesville, west of Highway 77 at Red River bridge

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Stenosiphon linifolius (Nutt. ex James) Heynh.

United States of America, Texas, Montague, 1 1/2 miles southeast of Nocona. Along highway. Sandy clay soils. Plants frequent, up to 8 feet tall. (Plant I, selected small size).

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Stenosiphon liniflorus (Nutt. ex E. James) Heynh.

United States, Texas, Montague, Along highway, 1.5 miles Southeast of Nocona.

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Stenosiphon liniflorus (Nutt. ex E. James) Heynh.

United States, Texas, Montague, Along highway, 1.5 miles Southeast of Nocona.

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Rhynchospora corniculata (Lam.) A. Gray

United States, Texas, Kaufman, Ca. 4.8 milles East of Mabank, TX.

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Rhynchospora corniculata (Lam.) A. Gray

United States, Texas, Kaufman, Ca. 4.8 milles East of Mabank, TX.

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Rubus flagellaris Willd.

United States, Texas, Denton, Roadside 6.5 mi. South of Aubrey.

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Rubus flagellaris Willd.

United States, Texas, Denton, Roadside 6.5 mi. South of Aubrey.

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Rubus bollianus L.H. Bailey

United States, Texas, Fannin, Woodlands, 4 miles north of Bonham.