Rudbeckia glaucescens |
Rudbeckia graminifolia |
|
---|---|---|
California coneflower, waxy cone-flower |
grassleaf coneflower |
|
Habit | Perennials, to 150 cm (roots fibrous). | Perennials, to 80 cm (roots fibrous). |
Stems | moderately strigose (hairs ascending). |
|
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 narrowly lanceolate to elliptic (grasslike, lengths 10+ times widths, not lobed), herbaceous, bases attenuate, margins entire, apices acute, faces glabrous or sparsely hirsute; basal petiolate or sessile, 10–25 × 0.5–1 cm; cauline sessile, 1–25 × 0.2–1 cm (distal smaller), bases attenuate. |
Receptacles | conic to columnar; paleae 4–6.5 mm, apices acute, often attenuate, abaxial tips hairy. |
hemispheric to ovoid; paleae 4–5 mm, (apical margins glabrous) apices acuminate-cuspidate, awn-tipped, abaxial tips sparsely strigose. |
Ray florets | 7–15; laminae elliptic to oblong, 25–40 × 8–14 mm, abaxially hairy. |
8–16; corollas orangish red to maroon, laminae elliptic to obovate, 10–25 × 3–6 mm, abaxially sparsely strigose. |
Disc florets | 250–400+; corollas yellowish green, 3–4 mm; style branches ca. 1 mm, apices acute. |
50–300+; corollas proximally maroon, distally brown-purple, 3.9–4.4 mm; style branches ca. 1.8 mm, apices obtuse to rounded. |
Phyllaries | to 1.5 cm. |
to 1 cm (spreading to reflexed). |
Heads | borne singly or (2–10) in ± corymbiform arrays. |
mostly borne singly. |
Cypselae | 4–5.5 mm; pappi coroniform or of ± connate scales, to 1.2 mm. |
2–3 mm; pappi coroniform, to 0.5 mm. |
Discs | 15–35 × 14–22 mm. |
10–15 × 8–15 mm. |
2n | = 36. |
= 38. |
Rudbeckia glaucescens |
Rudbeckia graminifolia |
|
Phenology | Flowering summer–fall. | Flowering spring–fall. |
Habitat | Meadows, seeps, streamsides | Wet, sandy flatwoods sites |
Elevation | 60–1300 m (200–4300 ft) | 0–30 m (0–100 ft) |
Distribution |
CA; OR
|
FL |
Discussion | Rudbeckia glaucescens often grows on serpentine and often with Darlingtonia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Rudbeckia graminifolia grows in the Apalachicola region. (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 | Echinacea atrorubens var. graminifolia |
Name authority | Eastwood: Leafl. W. Bot. 2: 55. (1937) | (Torrey & A. Gray) C. L. Boynton & Beadle: Biltmore Bot. Stud. 1: 12. (1901) |
Web links |