|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, perennial herb, subshrubs, shrubs
Leaves opposite or alternate, simple to deeply divided or compound, sessile or petioled
Inflorescence: heads radiate, discoid or disciform, solitary or in cymes; peduncles short or long; involucre cylindric, hemispheric, or bell-shaped; phyllaries in 23 ± equal series, linear to ovate; receptacle flat to conic, naked
Ray flowers: ligules yellow or white
Disk flowers many; corollas yellow or white, 4-lobed; anther tips triangular; style tips tapered
Fruit linear to oblanceolate, very flat, sometimes weakly 34-angled; surface dark brown or black, glabrous or puberulent; margins generally ± thick, puberulent to strongly ciliate; pappus 0 or a crown of fringed scales and 02 slender bristles
Species in genus: ± 75 species: sw North America
Etymology: (Greek: around the margin, from thick fruit margin)
Reference: [Powell 1974 Rhodora 76:229306]
Horticultural information: STBL.
Subshrub 1225 cmSee the CNPS Inventory for information about endangerment and rarity.
Stems many; hairs soft, spreading
Leaves opposite or alternate; petioles 0.52 mm; blade 12 cm, ovate to triangular or round, tip ± acute, margin serrate to lobed, surface soft-hairy and glandular
Inflorescence: heads discoid, 13; peduncles 14 cm; involucre bell-shaped; phyllaries 1421, 5.66.5 mm, linear-lanceolate
Ray flowers 0
Disk flowers: corollas 45 mm
Fruit 33.5 mm, 1 or both surfaces rounded or angled, puberulent; margins hairy; pappus 0 or a crown of vestigial scales
Ecology: Dry, rocky slopes
Elevation: 18002600 m.
Bioregional distribution: White and Inyo Mountains (s Inyo Mtns)
Synonyms: Laphamia i. Ferris