Pericome caudata |
|
---|---|
mountain tail-leaf, mountain taper leaf, tail pericome, tail-leaf pericome, taper leaf, yerba del chivato |
|
Stems | striate, terete, glabrous or hairy, often densely puberulent to tomentulose distally, sometimes gland-dotted. |
Leaves | petioles (5–)10–45 mm; blades (2–)3.5–12(–15) × 1–12 cm. |
Peduncles | 0.5–4 cm. |
Involucres | 4.5–10 × 4–10 mm. |
Disc corollas | tubes 1–3.5 mm, throats 2–5.5 mm, lobes 0.5–1 mm. |
Phyllaries | 0.5–1 mm wide, apices attenuate. |
Heads | 3–30+, usually tightly clustered. |
Cypselae | 3–5 mm; pappi crowns to ca. 1 mm plus 0–2 bristles 1–4.5 mm. |
2n | = 36. |
Pericome caudata |
|
Phenology | Flowering spring–fall. |
Habitat | Among rocks, boulders, on talus slopes, bluffs, crags, canyons, disturbed roadsides, in volcanic, limestone, and sandstone substrates |
Elevation | 1400–3300 m (4600–10800 ft) |
Distribution |
AZ; CA; CO; NM; NV; OK; TX; Mexico (Chihuahua)
|
Discussion | Populations of Pericome caudata may vary in leaf shape, head size, and indument, particularly in some far western and eastern populations. Central populations (e.g., in Colorado, New Mexico, and Arizona) tend to have relatively large, deltate-hastate leaves with long-attenuate tips and capitulescences of medium-sized heads. Specimens from Nevada and California often have smaller, ovate or cordate distal leaves with short-attenuate tips, as well as larger and fewer heads per capitulescence. Oklahoma specimens are often coarsely pubescent with copious glands and have leaves similar to the Nevada and California populations. This variability does not appear to warrant taxonomic distinction, nor does the presence or absence of pappus bristles appear to be taxonomically significant. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 21, p. 335. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Peritylinae > Pericome |
Synonyms | P. caudata var. glandulosa, P. glandulosa |
Name authority | A. Gray: Smithsonian Contr. Knowl. 5(6): 82. (1853) |
Web links |