Rudbeckia missouriensis Engelm. ex Boynton & Beadle

Perennials, to 80 cm (not rhizomatous, not stoloniferous, rosettes at bases of aerial stems). Stems (branches ascending) moderately hirsute (hairs spreading, 1+ mm). Leaves: blades linear to spatulate (not lobed), bases attenuate to cuneate, margins entire or remotely serrulate, apices acute to rounded, faces hirsute; basal petiolate, 5–20 × 0.5–2 cm; cauline petiolate (proximal) or sessile (distal), 2–15 × 0.4–1.5 cm. Heads borne singly or (2–12) in loose, corymbiform arrays. Phyllaries to 1.5 cm (faces hairy, more densely abaxially). Receptacles mostly hemispheric; paleae 5–6.5 mm, apices rounded to acute, abaxial tips glabrous. Ray florets 9–15; laminae elliptic to oblanceolate, 10–25 × 5–8 mm, abaxially sparsely strigose. Discs 8–15 × 10–17 mm. Disc florets 150–250+; corollas proximally greenish yellow, distally purple brown, 4–5.5 mm; style branches ca. 1.5 mm, apices obtuse. Cypselae 1.5–2.7 mm; pappi coroniform, ca. 0.1 mm. 2n = 38.

Rudbeckia fulgida Aiton var. missouriensis (Engelmann ex C. L. Boynton & Beadle) Cronquist

Rudbeckia missouriensis, the Missouri coneflower, is a flowering plant in the family Asteraceae and is found mostly in the Ozarks of Missouri and Arkansas in the central United States.

Rudbeckia missouriensis là một loài thực vật có hoa trong họ Cúc. Loài này được Engelm. ex C.L.Boynton & Beadle miêu tả khoa học đầu tiên năm 1901.