Encelia nutans |
Encelia farinosa |
|
---|---|---|
nodding sunray, noddinghead |
brittlebush, incienso |
|
Habit | Perennials, 10–25 cm (roots swollen, 6–10 cm). | Shrubs, 30–150 cm (sap fragrant). |
Stems | ± subterranean (except peduncles). |
branched distally, tomentose, developing smooth barks. |
Leaves | basal; petioles 20–35 mm; blades green, broadly ovate, 30–40 mm, faces glabrous or substrigose (sometimes rugose). |
cauline (clustered near stem tips); petioles 10–20 mm; blades silver or gray, ovate to lanceolate, 20–70 mm, apices obtuse or acute, faces tomentose. |
Peduncles | hairy. |
glabrous except near heads (± yellow). |
Involucres | 12–22 mm. |
4–10 mm. |
Ray florets | 0. |
11–21; corolla laminae 8–12 mm. |
Disc corollas | yellow, 6–8 mm. |
yellow or brown-purple, 5–6 mm. |
Phyllaries | lanceolate. |
lanceolate. |
Heads | borne singly (nodding in fruit). |
in paniculiform arrays (branching among heads mainly distal). |
Cypselae | 7–12 mm; pappi usually 0, rarely of 2 bristlelike awns. |
3–6 mm; pappi 0. |
2n | = 36. |
= 36. |
Encelia nutans |
Encelia farinosa |
|
Phenology | Flowering Apr. | Flowering Feb–May, Aug–Sep. |
Habitat | Flat areas with heavy soils | Coastal scrub, stony desert hillsides |
Elevation | 1300–1900 m (4300–6200 ft) | 0–1000 m (0–3300 ft) |
Distribution |
CO; UT
|
AZ; CA; NV; Mexico (Baja California, Baja California Sur, Sinaloa, Sonora)
|
Discussion | Encelia nutans shares the apically notched and glabrous-faced cypselae of the genus, but its geophyte habit, especially the ephemeral nature of its aboveground parts, is unique in either Encelia or Enceliopsis. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Plants of Encelia farinosa with brown-purple disc corollas, found along the Colorado and Salt rivers, and common in Baja California, are var. phenicodonta. Plants with substrigose leaves, capitulescences branched toward bases rather than distally, and ray florets reduced in both size and number are most often hybrids and backcrosses between E. farinosa and E. frutescens. P. A. Munz (1959) indicated that I. L. Wiggins had reported var. radians Brandegee ex S. F. Blake as occurring in southeastern California; that variety is known only from Baja California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 120. | FNA vol. 21, p. 121. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Enceliopsis nutans | E. farinosa var. phenicodonta |
Name authority | Eastwood: Zoë 2: 230. (1891) | A. Gray ex Torrey: in W. H. Emory, Not. Milit. Reconn., 143. (1848) |
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