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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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ASTERACEAE

SUNFLOWER FAMILY

David J. Keil, Family Editor and author, except as specified

Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many 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)4–5; stamens 4–5, 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):1–28. See glossary p. 25 for illustrations of general family characteristics.

STEBBINSOSERIS

Kenton L. Chambers

Annual, scapose; sap milky
Leaves ± basal, entire to pinnately lobed, glabrous or mealy (hairs drying as minute, white scales)
Inflorescence: heads, ligulate, solitary, ± drooping in bud; involucre glabrous; phyllaries ± lanceolate, outer < 1/3 X inner
Flowers 8–many; corollas readily withering, ± = involucre; ligules white or yellow, often reddish below
Fruit 10-ribbed, gray to brown or blackish; pappus scales 5, ± cut at tip, dull-white (silvery) to brownish, bristle-tip finely barbed
Etymology: (Greek: Stebbins' chicory, for G.L. Stebbins, Jr., Am geneticist, evolutionist, 1906–)
Reference: [Jansen et al. 1991 Amer J Bot 78:1015–1027]
Species in genus: 2 species: w North America. Derived by hybridization: Uropappus lindleyi X annual Microseris.

Native

S. heterocarpa (Nutt.) K.L. Chambers

Plant 8–60 cm
Leaf 5–35 cm
Inflorescence: involucre 9–30 mm
Flowers: ligules yellow or white
Fruit 4.5–12 mm, generally blue- or red-violet to brown or gray (or blackish in SCo); pappus scales > or = fruit, sometimes hairy, midrib thicker at base, tapered, bristle 3.5–8 mm, arising from notched scale tip
Chromosomes: 2n=36
Ecology: Open, sometimes disturbed sites, rocky to clay soils, generally ± inland
Elevation: < 1000 m.
Bioregional distribution: North Coast Ranges, Sierra Nevada Foothills, San Joaquin Valley, Central Western California, South Coast, Channel Islands, Peninsular Ranges
Distribution outside California: n Mexico, se Arizona
Synonyms: Microseris h. (Nutt.) K.L. Chambers; M. lindleyi (DC.) A. Gray misapplied; Uropappus l. (DC.) Nutt. misapplied
Derived from Microseris douglasii X Uropappus l
Horticultural information: TRY.

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bioregional map for STEBBINSOSERIS%20heterocarpa being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Stebbinsoseris heterocarpa
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