|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 < 30 cm, monoecious, ± glabrous
Stem branched, erect
Leaves cauline, alternate, < 15 cm, entire or lobed
Inflorescence: heads radiate, borne in cymes; phyllaries in 1 series, thin, margins clear; receptacle flat, naked
Ray flowers 613, pistillate, (pistillate flowers without corollas sometimes also present); ligules ± yellow (or 0)
Disk flowers 2100, staminate; corolla yellow; anthers obcordate, pollen yellow or white; style undivided, tip head-like
Fruit 24.5 mm, obovoid, generally papillate (if so, gray, sticky when wet); pappus 0
Species in genus: 3 species: CA & Chile
Etymology: (Greek: slimy seed)
Reference: [Ornduff 1964 Brittonia 16:289295]
See the CNPS Inventory for information about endangerment and rarity.
Leaves 515 cm, linear; lower entire; upper 13-lobed, lobes 13 cm
Inflorescence: involucre 68 mm
Ray flowers: ligules 57 mm, yellow; stigma dark red; pistillate flowers without corollas 0
Disk flowers: stigma and pollen white
Fruit 34 mm, strongly 46-angled, papillate
Ecology: Vernal pools, wet grasslands
Elevation: < 100 m.
Bioregional distribution: North Coast Ranges, ne San Francisco Bay Area (s Sonoma Co.)
Horticultural information: In cultivation.