Rudbeckia missouriensis

Engelmann ex C. L. Boynton & Beadle

Biltmore Bot. Stud. 1: 17. 1901.

Common names: Missouri or Missouri orange coneflower
Synonyms: Rudbeckia fulgida var. missouriensis (Engelmann ex C. L. Boynton & Beadle) Cronquist
Treatment appears in FNA Volume 21. Treatment on page 58. Mentioned on page 53.

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.

Phenology: Flowering late spring–fall.
Habitat: Dry, rocky prairies, limestone glades
Elevation: 10–80 m



Ark., Ill., Ky., La., Mo., Okla., Tex.


Selected References


Lower Taxa

... more about "Rudbeckia missouriensis"
Lowell E. Urbatsch +  and Patricia B. Cox +
Engelmann ex C. L. Boynton & Beadle +
Missouri or Missouri orange coneflower +
Ark. +, Ill. +, Ky. +, La. +, Mo. +, Okla. +  and Tex. +
10–80 m +
Dry, rocky prairies, limestone glades +
Flowering late spring–fall. +
Biltmore Bot. Stud. +
Illustrated +  and Endemic +
Rudbeckia fulgida var. missouriensis +
Rudbeckia missouriensis +
Rudbeckia sect. Rudbeckia +
species +