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

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



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.



Kenton L. Chambers

Species in genus: 1 sp
Etymology: (Latin: tailed pappus, from awn-tipped scales)


U. lindleyi (DC.) Nutt.

Annual 5–70 cm, ± scapose; sap milky
Leaf 5–30 cm, ± basal, ± linear, long-tapered, entire to narrowly lobed, ± soft-hairy (especially petiole base)
Inflorescence: head, ligulate solitary, erect; involucre 10–40 mm, glabrous; phyllaries narrowly lanceolate, outer progressively shorter; receptacle naked
Flowers 5–many; corollas yellow (often reddish below), readily withering, < or = involucre
Fruit 7–17 mm, slender, tapered to tip in CA, obscurely 10-ribbed, generally blackish; outermost fruits scabrous; pappus scales 5, 5–15 mm, deciduous, smooth, silvery, bristle-tip 4–6 mm, slender, smooth, from notched scale tip
Chromosomes: 2n=18
Ecology: Common. Open grassland, woods, chaparral, deserts, generally in loose soils
Elevation: < 1800 m.
Bioregional distribution: California (except North Coast)
Distribution outside California: to Washington, Idaho, Utah, w Texas, n Mexico
Flowering time: Apr–May
Synonyms: Microseris l. (DC.) A. Gray; M. linearifolia (DC.) Sch.Bip
With annual Microseris species a parent of Stebbinsoseris
Horticultural information: TRY.

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