|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, generally grayish, cobwebby to tomentose
Stems 1several, erect; central axis dominant
Leaves simple, alternate (ours), ± sessile, narrowly oblanceolate to elliptic (ours), entire
Inflorescence: heads disciform, ± sessile, solitary or in groups of 25; bracts like leaves; phyllaries 46, equal, obovate, rounded, scarious, persistent; receptacle chaffy; chaff scales subtending the pistillate flowers (pistillate chaff) > phyllaries, each enclosing a flower, falling with a fruit, bulged out and up, ± compressed side-to-side, ± thickened, hard (at least in part), ± woolly, tip ± offset to inner edge, scarious-winged; chaff scales subtending disk flowers (disk chaff) 0 or reduced, open or folded, glabrous, scarious
Pistillate flowers 48(12) in 1(2) series; corollas tubular
Disk flowers staminate, 25; ovary vestigial
Fruit obovate, bulged out and up, compressed side-to-side, smooth; style ± offset to inner edge; pappus 0; disk pappus 0 or of 15 smooth, deciduous bristles, included
Species in genus: 5 species: CA-FP, Medit
Etymology: (Greek: small foot)
Reference: [Holub 1976 Flora Europaea 4:126]
Ongoing research may show CA species fit best in Eur Bombycilaena , a conclusion compatible with this generic description.
Inflorescence: heads 24 mm, depressed; receptacle not > wide; pistillate chaff scales 24 mm, thickened and hard throughout, tip projected upward from inner edge of scale, ± cylindric, beak-like, wing obscure, ± linear, withering; disk chaff 0
Pistillate flowers 46 in 1 series
Disk flowers 12 mm, 5-lobed
Fruit 1.42.6 mm; pappus bristles of disk fruit 0 or 1, 0.91.5 mm
Ecology: Dry or moist, bare or grassy places
Elevation: < 1700 m.
Bioregional distribution: California Floristic Province
Distribution outside California: w Oregon, nw Baja California
Inflorescence: heads 23 mm, 34.5 mm wide; pistillate chaff scales 23 mm, wool thin, ± appressed
Disk flowers 11.5 mm
Fruit 1.42.2 mm; pappus of disk fruit (0)0.91.3 mm
Ecology: Dry places
Elevation: 501000 m.
Bioregional distribution: c Sierra Nevada Foothills (very uncommon), Central Western California (except Inner South Coast Ranges).