Rudbeckia auriculata

(Perdue) Kral

Rhodora 77: 49. 1975.

Common names: Alabama or eared coneflower
EndemicConservation concern
Basionym: Rudbeckia fulgida var. auriculata Perdue Rhodora 63: 119. 1961
Treatment appears in FNA Volume 21. Treatment on page 48. Mentioned on page 47.

Perennials, to 300 cm (rhizomatous, roots fibrous). Leaves green, oblong to elliptic or ovate to pandurate, herbaceous, margins crenate, dentate, entire or serrate, apices acute, faces scabrous, abaxial often glabrescent; basal petiolate, 20–65 × 8–20 cm, bases attenuate; cauline sessile, 15–40 × 4–15 cm, bases auriculate to truncate. Heads (usually 10+) in paniculiform arrays. Phyllaries to 1 cm. Receptacles conic to ovoid; paleae 4–6 mm, apices obtuse to acute, abaxial tips hairy. Ray florets 8–14; laminae oblanceolate, 18–30 × 4–8 mm, abaxially sparsely hairy. Discs 12–16 × 10–18 mm. Disc florets 150–200; corollas brown-purple, 3.5–4.2 mm; anther appendages glabrous or gland-dotted; style branches to ca. 1.8 mm, apices acute to obtuse. Cypselae 3.5–5 mm; pappi of 4–6, unequal scales, to 2 mm. 2n = 36.


Phenology: Flowering summer–fall.
Habitat: Sandy stream banks, wet roadsides
Elevation: 10–90 m

Discussion

Of conservation concern.

Rudbeckia auriculata is known from eight sites in Alabama, one in Florida, and one in Georgia.

Selected References

None.

Lower Taxa

None.
... more about "Rudbeckia auriculata"
Lowell E. Urbatsch +  and Patricia B. Cox +
(Perdue) Kral +
Rudbeckia fulgida var. auriculata +
Alabama or eared coneflower +
Ala. +, Fla. +  and Ga. +
10–90 m +
Sandy stream banks, wet roadsides +
Flowering summer–fall. +
Endemic +  and Conservation concern +
Rudbeckia subg. Macrocline +
Rudbeckia auriculata +
Rudbeckia sect. Macrocline +
species +