Rudbeckia glaucescens |
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California coneflower, waxy cone-flower |
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Habit | Perennials, to 150 cm (roots fibrous). |
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. |
Receptacles | conic to columnar; paleae 4–6.5 mm, apices acute, often attenuate, abaxial tips hairy. |
Ray florets | 7–15; laminae elliptic to oblong, 25–40 × 8–14 mm, abaxially hairy. |
Disc florets | 250–400+; corollas yellowish green, 3–4 mm; style branches ca. 1 mm, apices acute. |
Phyllaries | to 1.5 cm. |
Heads | borne singly or (2–10) in ± corymbiform arrays. |
Cypselae | 4–5.5 mm; pappi coroniform or of ± connate scales, to 1.2 mm. |
Discs | 15–35 × 14–22 mm. |
2n | = 36. |
Rudbeckia glaucescens |
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Phenology | Flowering summer–fall. |
Habitat | Meadows, seeps, streamsides |
Elevation | 60–1300 m (200–4300 ft) |
Distribution |
CA; OR
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Discussion | Rudbeckia glaucescens often grows on serpentine and often with Darlingtonia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 48. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Rudbeckiinae > Rudbeckia > sect. Macrocline |
Sibling taxa | |
Synonyms | R. californica var. glauca |
Name authority | Eastwood: Leafl. W. Bot. 2: 55. (1937) |
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