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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

Annual to perennial herb
Leaves basal or some cauline, alternate
Inflorescence: heads radiate, 1–many; involucre ± hemispheric; phyllaries in 2–several series, narrowly membranous-margined; receptacle naked
Ray flowers many; ligules linear, yellow
Disk flowers many; corolla yellow; anther base appendages bristle-like; style branches ± club-like, spreading
Fruit subcylindric, 5-ribbed, short-hairy; outer pappus a short crown of ± fused scales, inner of barbed bristles
Etymology: (Latin: flea-like)
Reference: [Raven 1963 Aliso 5:251–253]


P. paludosa Link

Plant 6–12 dm, from short rhizome, stiff, ± soft-hairy
Leaves 1–3(8) cm, linear to oblong, entire, often rolled under, ± clasping
Inflorescence: heads many; peduncles 1–3 cm; involucre 4–5 mm, 6–10 mm diam; phyllaries 2.7–4.8 mm, subequal in 2–3 series, narrowly linear
Ray flowers: corollas 3.5–4 mm, tube 1.5–2 mm, ligule 1.5–2 mm
Disk flowers: corollas 2.2–3 mm
Fruit ± 1 mm; outer pappus < 0.4 mm; inner pappus bristles 8–16, 2–3 mm
Chromosomes: 2n=18
Ecology: Uncommon. Damp sand
Elevation: < 700 m.
Bioregional distribution: w San Joaquin Valley, Southwestern California, eastern Sonoran Desert
Distribution outside California: native to Europe
Synonyms: P. hispanica (Boiss.) Boiss

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