|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1many per head
Flowers bisexual, unisexual, or sterile, ± small, of several types; calyx 0 or modified into pappus of bristles, scales, or awns, which is generally persistent in fruit; corolla radial or bilateral (rarely 0), lobes generally (0)45; stamens 45, anthers generally fused into cylinder around style, often appendaged at tips, bases, or both, filaments generally free, generally attached to corolla near throat; pistil 1, ovary inferior, 1-chambered, 1-seeded, style 1, branches 2, generally hair-tufted at tip, stigmas 2, generally on inside of style branches
Fruit: achene, cylindric to ovoid, generally deciduous with pappus attached
Genera in family: ± 1300 genera, 21,000 species (largest family of dicots): worldwide. Largest family in CA. Also see tribal key to CA genera: Strother 1997 Madroño 44(1):128. See glossary p. 25 for illustrations of general family characteristics.
Annual or perennial herb < 60 dm, generally ± branched, generally erect; sap milky
Leaves generally basal and cauline, alternate, sessile, generally reduced upward
Inflorescence: heads ligulate, 210 mm diam; involucre 520 mm, generally bell-shaped; phyllaries in 36 series; receptacle naked or with fragile bristles < 5 mm
Flowers: corollas readily withering; ligules yellow or white, generally ± purple-striped below
Fruit generally fusiform, straw-colored to purple-brown, truncate; veins 15 (5 generally prominent, 10 sometimes obscure); outer pappus ± 0 or of 06 smooth, persistent bristles, inner 1232 bristles fused at base, readily deciduous, minutely barbed below
Species in genus: 21 species: w North America, s South America
Etymology: (Greek: soft hair)
Reference: [Williams 1957 Am Midland Naturalist 58:494517]
Annual 321 cm, glabrousSee the CNPS Inventory for information about endangerment and rarity.
Stem ± glaucous
Leaves: basal obovate, sharply 26-lobed; cauline 610-lobed, especially near base
Inflorescence: heads 410 mm diam; involucre 912 mm; outer phyllaries ± 2/3 inner, widely ovate
Flowers: corollas 1219 mm, light yellow, outer corollas exserted 611 mm
Fruit 1.32.1 mm, ± dark brown; outer pappus of irregular teeth, bristles 0(1)
Ecology: UNCOMMON. Shallow soils, canyon flats or slopes
Elevation: < 200 m.
Bioregional distribution: n Channel Islands (Anacapa, Santa Cruz islands).