Rudbeckia glaucescens |
Rudbeckia heliopsidis |
|
---|---|---|
California coneflower, waxy cone-flower |
little river black-eyed susan, sunfacing coneflower |
|
Habit | Perennials, to 150 cm (roots fibrous). | Perennials, to 120 cm (rhizomatous). |
Stems | villous to glabrate. |
|
Leaves | bluish green (heavily glaucous), blades lanceolate to elliptic (not lobed), leathery, bases attenuate, margins entire or remotely serrulate, apices acute, faces glabrous; basal petiolate, 20–50 × 4–10 cm; cauline petiolate or sessile, 10–25 × 2–8 cm. |
blades elliptic, lanceolate, or ovate (flat, not lobed), bases acute to rounded or cuneate, margins entire or serrate, apices acute, faces glabrous or sparsely strigose and gland-dotted; basal petiolate, blades 10–20 × 2–5 cm; cauline petiolate (proximal) or nearly sessile (distal), blades 2–20 × 1–4 cm. |
Receptacles | conic to columnar; paleae 4–6.5 mm, apices acute, often attenuate, abaxial tips hairy. |
hemispheric to ovoid; paleae 3.2–4.2 mm, apices rounded to acute, abaxial tips canescent and gland-dotted. |
Ray florets | 7–15; laminae elliptic to oblong, 25–40 × 8–14 mm, abaxially hairy. |
6–12; laminae elliptic to oblanceolate (spreading), 15–30 × 3–6 mm, abaxially strigose and gland-dotted. |
Disc florets | 250–400+; corollas yellowish green, 3–4 mm; style branches ca. 1 mm, apices acute. |
100–200+; corollas proximally yellowish green, distally brown-purple, 3–4 mm; style branches ca. 1.4 mm, apices obtuse. |
Phyllaries | to 1.5 cm. |
to 1.5 cm (faces sparsely to moderately hairy and gland-dotted). |
Heads | borne singly or (2–10) in ± corymbiform arrays. |
usually (4–8) in ± corymbiform arrays, sometimes borne singly. |
Cypselae | 4–5.5 mm; pappi coroniform or of ± connate scales, to 1.2 mm. |
2–3 mm; pappi coroniform, to 1.5 mm (sometimes cypselae each with glandular hairs around apices). |
Discs | 15–35 × 14–22 mm. |
10–15 × 7–15 mm. |
2n | = 36. |
|
Rudbeckia glaucescens |
Rudbeckia heliopsidis |
|
Phenology | Flowering summer–fall. | Flowering summer–fall. |
Habitat | Meadows, seeps, streamsides | Mesic to wet woodlands, meadows |
Elevation | 60–1300 m (200–4300 ft) | 70–200 m (200–700 ft) |
Distribution |
CA; OR
|
AL; GA; NC; SC; VA |
Discussion | Rudbeckia glaucescens often grows on serpentine and often with Darlingtonia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 48. | 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 | ||
Synonyms | R. californica var. glauca | |
Name authority | Eastwood: Leafl. W. Bot. 2: 55. (1937) | Torrey & A. Gray: Fl. N. Amer. 2: 310. (1842) |
Web links |