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Heterotheca villosa var. villosa
Heterotheca villosa var. villosa
Family:
Asteraceae
[
Chrysopsis mollis
Nutt.,
more
Chrysopsis villosa
DC.,
Chrysopsis villosa var. glomerata
(A. Nelson) V.L. Harms,
Chrysopsis villosa var. minor
Hook.,
Chrysopsis villosa var. villosa
Cronquist
]
Flora of North America
Resources
John C. Semple in Flora of North America (vol. 20)
Stems
decumbent to erect, 16-39 cm, moderately to densely strigose, sparsely to abundantly long-hirsute, eglandular or sparsely stipitate-glandular.
Distal cauline leaf blades
oblanceolate, 21-35 × 3.5-6 mm, bases narrowly cuneate to attenuate, margins flat, apices acute, faces moderately strigose (20-60 hairs/mm
2
), eglandular or sparsely stipitate-glandular.
Heads
1-12(-25).
Peduncles
(5-)12-47(-67) mm, sparsely to densely hispido-strigose, eglandular; bracts subtending heads usually none, rarely linear-oblanceolate, leaflike.
Involucres
narrowly cylindric to campanulate (fresh), (5-)6-9(-11) mm.
Phyllaries
narrowly triangular-lanceolate, margins usually reddish purple distally, faces moderately to densely strigose, eglandular.
Ray florets
10-27(-38), laminae (6.5-)8.5-15(-20) mm.
2
n
= 18, 36. Flowering (May-)Jun-Oct(-Nov, south). Silty, sandy loam or clay soils, chalk, or granitic soils, gravel soils, dry shale-limestone soils, red sandstone soils, travertine soils of sandhill prairies, pastures, grasslands, roadsides, railroad rights-of-way; 300-2300(-2900) m; Alta., B.C., Man. , Ont., Sask.; Colo., Idaho, Ill., Kans., Mich., Mont., Nebr., N.Dak., Oreg., S.Dak., Wash., Wyo. Variety
villosa
grows primarily in the Great Plains region; it is rare in Colorado, Idaho, Illinois, Kansas, and Oregon, and represented in Michigan and southern Ontario by chance introduction.
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