|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.
See the CNPS Inventory for information about endangerment and rarity.
Inflorescence: heads 3.55 mm, ± spheric; receptacle 1.21.8 X > wide; pistillate chaff scales 23 mm, thick and hard near midvein, tip projected inward from near top of scale, ± flat to concave, wing prominent, ovate, not withering; disk chaff present
Pistillate flowers 812 in 2 series
Disk flowers 1.21.9 mm, 4-lobed
Fruit 11.5 mm; pappus bristles of disk fruit 15, 1.72 mm
Ecology: UNCOMMON. Bare, grassy, or rocky slopes
Elevation: 50800 m.
Bioregional distribution: s North Coast Ranges, San Francisco Bay Area, s Outer South Coast Ranges (Santa Barbara Co.), rare in n Sierra Nevada Foothills
Synonyms: Stylocline a. (A. Gray) J.T. Howell
Distinct but ± intermediate between M. californicus and Stylocline species; perhaps of hybrid origin.