|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 115 dm, green to canescent, generally self-sterile
Leaves alternate (or lower opposite), linear to oblanceolate, entire to toothed; lower soon deciduous; upper ± bract-like
Inflorescence spike- to panicle-like; heads radiate, opening in evening, generally closing by ± midday, ± short-peduncled; phyllaries fully folded around ray ovaries, falling with fruits, tips flat, erect or spreading; receptacle flat, short-hairy; chaff scales 5 in ring between ray and disk flowers, weakly fused
Ray flowers 5; ligule 3-lobed, yellow, red-veined, often aging purplish
Disk flowers 6, staminate; corolla yellow; anthers black, tips widely triangular; ovaries slender, style branches undivided
Fruit: pappus 0; ray achenes compressed front-to-back
Species in genus: 4 species: CA
Etymology: (Greek: hare leaf, from copious leaf hairs)
Reference: [Thompson 1983 PhD Univ CA Davis]
Stems 0many-branched, soft-hairy, often becoming glabrous
Leaves: lower 312 cm, toothed, early deciduous; middle entire, deciduous, with axillary leaf clusters; upper bract-like, densely canescent to silvery-hairy, long-ciliate, uppermost glandular
Inflorescence head- to panicle-like, ± glandular; heads generally closing early morning; involucre obconic; phyllaries 4.47.5 mm, lanceolate, short-hairy, densely long-ciliate, tip < body
Ray flowers: ligules 35.5 mm, pale yellow
Disk flowers: corollas 3.54 mm
Fruit 2.54 mm, narrowly obovate, dull, ± black; midvein obscure
Ecology: Many dry habitats
Elevation: < 1600 m.
Bioregional distribution: California Floristic Province, Modoc Plateau
Distribution outside California: to Washington, Idaho, Montana, n Nevada
Fls spring to autumn. Self-fertile.
Stems generally stout; branches 0few, short, densely leafy
Inflorescence dense, leafy-bracted; clusters head-like
Ecology: Habitats of sp.
Elevation: < 1400 m.
Bioregional distribution: Inner North Coast Ranges, Sierra Nevada Foothills, sw Sacramento Valley, e San Francisco Bay Area
Synonyms: L. c. Greene