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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.


Gregory K. Brown

Perennial from taproot or branched caudex, glandular
Leaves: basal persistent; cauline alternate, reduced above, oblanceolate, 1–3-veined
Inflorescence loose; heads radiate, 1–5; involucre bell-shaped; phyllaries in 3–4 ± equal series, lanceolate, 1-veined, outer graduated into upper leaves; receptacle convex, naked
Ray flowers 10–25; ligules < 12 mm, yellow
Disk flowers many; corolla flaring slightly, yellow
Fruit narrowly oblong, ± cylindric, fusiform, or compressed, hairy; pappus of many white bristles in 1 series
Species in genus: ± 4 species: w North America
Etymology: (Anagram of Stenotus)
Reference: [Nesom & Morgan 1990 Phytologia 68:174–180]


T. peirsonii (D.D. Keck) G.L. Nesom & D.R. Morgan

Stems < 20 cm
Leaves < 8 cm, toothed
Inflorescence: involucre 15–20 mm; phyllaries green
Disk flowers: corollas 8–10 mm
Fruit 5 mm; pappus < disk corolla
Chromosomes: 2n=90
Ecology: Rocky alpine and subalpine slopes
Elevation: 2900–3700 m.
Bioregional distribution: c High Sierra Nevada (Inyo, Fresno cos.), White and Inyo Mountains
Flowering time: Jul–Aug
Synonyms: Haplopappus p. (D.D. Keck) J.T. Howell
Horticultural information: TRY; DFCLT.
See the CNPS Inventory for information about endangerment and rarity.
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