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Rudbeckia graminifolia
(Torr. & A. Gray) C.L. Boynt. & Beadle
Family:
Asteraceae
Flora of North America
Resources
Lowell E. Urbatsch, Patricia B. Cox in Flora of North America (vol. 21)
Perennials,
to 80 cm (roots fibrous).
Stems
moderately strigose (hairs ascending).
Leaves:
blades narrowly lanceolate to elliptic (grasslike, lengths 10+ times widths, not lobed), herbaceous, bases attenuate, margins entire, apices acute, faces glabrous or sparsely hirsute; basal petiolate or sessile, 10-25 × 0.5-1 cm; cauline sessile, 1-25 × 0.2-1 cm (distal smaller), bases attenuate.
Heads
mostly borne singly.
Phyllaries
to 1 cm (spreading to reflexed).
Receptacles
hemispheric to ovoid; paleae 4-5 mm, (apical margins glabrous) apices acuminate-cuspidate, awn-tipped, abaxial tips sparsely strigose.
Ray florets
8-16; corollas orangish red to maroon, laminae elliptic to obovate, 10-25 × 3-6 mm, abaxially sparsely strigose.
Discs
10-15 × 8-15 mm.
Disc florets
50-300+; corollas proximally maroon, distally brown-purple, 3.9-4.4 mm; style branches ca. 1.8 mm, apices obtuse to rounded.
Cypselae
2-3 mm;
pappi
coroniform, to 0.5 mm.
2
n
= 38. Flowering spring-fall. Wet, sandy flatwoods sites; 0-30 m; Fla.
Rudbeckia graminifolia
grows in the Apalachicola region.
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