|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.
Perennial from stout, taprooted caudex, generally ± unbranched
Leaves alternate, generally reduced upward; petiole generally << blade, often winged
Inflorescence: heads generally radiate, 1few, ± large; involucre hemispheric or bell-shaped; phyllaries ± many in 23 series, outer often ± leaf-like; receptacle ± convex; chaff scales ± linear, entire, generally ± hairy
Ray flowers (0)520; ligules yellow
Disk flowers many; corollas yellow, lobes short; anthers brown or yellow, tips triangular; style tips linear, tapered
Fruit: pappus 0 or crown of scales; ray achenes 3-angled; disk achenes 4-angled, sometimes ± compressed
Etymology: (Nathaniel J. Wyeth, US explorer, 18021856)
Reference: [Weber 1946 Amer Midl Naturalist 35:400452]
Plant 35 dm, glabrous or puberulent, ± gland-dottedSee the CNPS Inventory for information about endangerment and rarity.
Leaves: basal blades 1020 cm, oblong-oblanceolate
Inflorescence: peduncle 38 cm; involucre 1530 mm diam, bell-shaped; phyllaries ± equal, 1530 mm, lanceolate to ovate, barely leaf-like, margins puberulent; chaff scales 1517 mm
Ray flowers 510; ligule 2030 mm
Disk flowers: corollas 1011 mm
Fruit 810 mm, glabrous or tip puberulent; pappus scales < 1 mm, obtuse
Ecology: UNCOMMON. Grassland, open forest
Elevation: 7501500 m.
Bioregional distribution: Klamath Ranges, n North Coast Ranges.