Rudbeckia alpicola |
Rudbeckia grandiflora |
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showy black-eyed susan, showy coneflower, Washington, Washington showy black-eyed susan, Wenatchee coneflower, Wenatchee Mountain, Wenatchee Mountain showy black-eyed susan, Wenatchee Mountains coneflower |
largeflower coneflower, rough coneflower |
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Habit | Perennials, to 150 cm (rhizomes stout, plants not colonial, roots fibrous). | Perennials, to 120 cm (roots fibrous, caudices often woody). | ||||
Stems | proximally glabrous or sparsely hairy (hairs spreading), distally strigose (hairs ascending). |
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Leaves | green, ovate to elliptic or deltate, pinnate to pinnatifid or lyrate-pinnatifid, herbaceous, faces moderately to densely hairy (hairs 1-seriate); basal petiolate, 25–70 × 8–45 cm, lobes 3–9, bases rounded to acute, apices acute; cauline petiolate or sessile, 12–50 × 5–40 cm, bases attenuate to cuneate, ultimate margins dentate to lobed, apices acute. |
blades elliptic, lanceolate, or ovate (± conduplicate, not lobed), bases cuneate to rounded, margins entire or remotely serrate, apices acute, faces strigose, abaxially gland-dotted; basal petiolate, 10–35 × 2–11 cm; cauline petiolate (proximal) to nearly sessile (distal), 4–30 × 1.5–9 cm. |
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Receptacles | columnar; paleae 5–7 mm, apices obtuse to acute, often apiculate, abaxial tips hairy. |
hemispheric to ovoid; paleae 5–6.5 mm, (apical margins glabrous) acuminate-cuspidate, awn-tipped, abaxial tips sparsely strigose. |
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Ray florets | 0. |
12–25; laminae elliptic to obovate (reflexed), 20–50 × 5–10 mm, abaxially hairy and gland-dotted. |
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Disc florets | 300–500; corollas brown-purple, 4.2–5.8 mm; style branches ca. 2 mm, apices acute. |
200–800+; corollas greenish yellow basally and in lobes, otherwise maroon, 3.5–5 mm; style branches ca. 1.8 mm, apices obtuse. |
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Phyllaries | to 6 cm (foliaceous, faces scabrous). |
to 15 mm (strigose and gland-dotted). |
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Heads | borne singly or (2–10) in ± corymbiform arrays. |
mostly borne singly. |
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Cypselae | 3.5–5 mm; pappi of 4 scales, to 1 mm. |
2–3 mm; pappi coroniform, to 0.5 mm. |
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Discs | 30–80 × 18–30 mm. |
10–30 × 15–25 mm. |
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Rudbeckia alpicola |
Rudbeckia grandiflora |
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Phenology | Flowering mid summer–fall. | |||||
Habitat | Thickets, bogs, along streams | |||||
Elevation | 200–1500 m (700–4900 ft) | |||||
Distribution |
WA
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AR; GA; IL; KS; KY; LA; MO; MS; OH; OK; TX; Mostly c, e, and s United States
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Discussion | Of conservation concern. Rudbeckia alpicola is known only from Chelan and Kittitas counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 21, p. 47. | FNA vol. 21, p. 56. | ||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Rudbeckiinae > Rudbeckia > sect. Macrocline | Asteraceae > tribe Heliantheae > subtribe Rudbeckiinae > Rudbeckia > sect. Rudbeckia | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | R. occidentalis var. alpicola | Centrocarpha grandiflora | ||||
Name authority | Piper: Erythea 7: 173. (1899) | (Sweet) C. C. Gmelin ex de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 556. (1836) | ||||
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