Rudbeckia graminifolia
(Torr. & A. Gray) C.L. Boynt. & Beadle
Family:
Asteraceae
Grass-Leaf Coneflower
[
Echinacea atrorubens var. graminifolia
]
FNA
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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