Jepson Flora Project: Jepson Interchange    

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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.



G. Ledyard Stebbins

Biennial or perennial herb from strong taproot; herbage ± glabrous; sap milky
Stems: branches few, strongly ascending
Leaves basal and cauline, alternate, entire, grass-like, parallel-veined
Inflorescence: heads ligulate, solitary at branch tips; peduncles long, naked; involucre cylindric or narrowly conic; phyllaries in 1 series; receptacle naked
Flowers yellow to bronze or purple; ligules readily withering
Fruit 2.5–3 cm; beak stout, > body; pappus of stout plumose bristles, 2° bristles tangled, tips of a few bristles > the rest, unbranched; fruits spreading, forming a spheric head 4–5 cm diam
Species in genus: ± 45 species: Eurasia
Etymology: (Greek: goat's beard)


T. porrifolius L.


Biennial 4–10 dm
Leaves 2–4 dm
Inflorescence: peduncle much wider toward tip; phyllaries 5–11, 2.5–4 cm in flower heads, > flowers, 4–7 cm in fruit heads
Flowers: ligules purple
Fruit 2.5–4 cm; pappus ± brown
Chromosomes: 2n=12
Ecology: Common. Weed in waste places
Elevation: 0–1700 m.
Bioregional distribution: Most of California Floristic Province
Distribution outside California: native to Europe

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