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Rudbeckia alpicola

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

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).

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.

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.

Ray florets

0.

12–25;

laminae elliptic to obovate (reflexed), 20–50 × 5–10 mm, abaxially hairy and gland-dotted.

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.

Phyllaries

to 6 cm (foliaceous, faces scabrous).

to 15 mm (strigose and gland-dotted).

Heads

borne singly or (2–10) in ± corymbiform arrays.

mostly borne singly.

Cypselae

3.5–5 mm;

pappi of 4 scales, to 1 mm.

2–3 mm;

pappi coroniform, to 0.5 mm.

Discs

30–80 × 18–30 mm.

10–30 × 15–25 mm.

Rudbeckia alpicola

Rudbeckia grandiflora

Phenology Flowering mid summer–fall.
Habitat Thickets, bogs, along streams
Elevation 200–1500 m (700–4900 ft)
Distribution
from FNA
WA
[WildflowerSearch map]
[BONAP county map]
from FNA
AR; GA; IL; KS; KY; LA; MO; MS; OH; OK; TX; Mostly c, e, and s United States
[WildflowerSearch map]
[BONAP county map]
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.)

Key
1. Stems glabrous or sparsely hairy proximally and hairy distally (hairs ascending, mostly shorter than 0.5 mm)
var. alismifolia
1. Stems hairy (hairs spreading proximally, ascending distally, ca. 1 mm)
var. grandiflora
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
R. amplexicaulis, R. auriculata, R. californica, R. fulgida, R. glaucescens, R. graminifolia, R. grandiflora, R. heliopsidis, R. hirta, R. klamathensis, R. laciniata, R. maxima, R. missouriensis, R. mohrii, R. mollis, R. montana, R. nitida, R. occidentalis, R. scabrifolia, R. subtomentosa, R. texana, R. triloba
R. alpicola, R. amplexicaulis, R. auriculata, R. californica, R. fulgida, R. glaucescens, R. graminifolia, R. heliopsidis, R. hirta, R. klamathensis, R. laciniata, R. maxima, R. missouriensis, R. mohrii, R. mollis, R. montana, R. nitida, R. occidentalis, R. scabrifolia, R. subtomentosa, R. texana, R. triloba
Subordinate taxa
R. grandiflora var. alismifolia, R. grandiflora var. grandiflora
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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