Rudbeckia graminifolia (Torr. & A. Gray) C. L. Boynt. & Beadle

Rudbeckia graminifolia grows in the Apalachicola region.

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. 2n = 38.

Echinacea atrorubens (Nuttall) Nuttall var. graminifolia Torrey & A. Gray, Fl. N. Amer. 2: 306. 1842

Rudbeckia graminifolia, the grassleaf coneflower, is a species of flowering plant. It grows in parts of the Florida Panhandle. It produces tubular disc flowers, which go on to form seeds and ray flowers. The flowering plants have been spotted in wet roadside ditches.

Rudbeckia graminifolia là một loài thực vật có hoa trong họ Cúc. Loài này được (Torr. & A.Gray) C.L.Boynton & Beadle miêu tả khoa học đầu tiên năm 1901.