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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.



Meredith A. Lane

Biennial to subshrub from taproot or woody caudex, glabrous to tomentose or glandular-sticky
Leaves entire to pinnately lobed, generally clasping, gland-dotted
Inflorescence: heads generally radiate, 1–many; involucres obconic to hemispheric, generally gummy; phyllaries in 4–10 series, bases generally tough, tips green; receptacle flat to convex, naked, ± pitted
Ray flowers 0–many; ligules yellow
Disk flowers: corollas yellow; style appendages linear to lanceolate, generally = or > stigmatic portion
Fruit cylindric or swollen-obconic, shiny white to ± brown, glabrous, smooth to ridged; pappus of 1–6 awns ± < disk corollas, generally < 0.2 mm wide, generally U-shaped in X -section, generally entire, deciduous
Species in genus: ± 80 species: c&w North America, South America
Etymology: (D.H. Grindel, 1776–1836, Latvian botanist)
Hybrids common.


G. fraxino-pratensis Reveal & Beatley


Perennial 5–12 dm, erect, branched above, tan to reddish, glabrous, resinous
Leaves: cauline 1–7 cm, generally oblanceolate to oblong, entire to serrate toward tip, acute, generally dark green, densely gland-dotted, bases narrowly clasping
Inflorescence: heads 1–4; involucres 5–10 mm diam, ± obconic; phyllaries 4–5 series, ± erect
Ray flowers ± 13; corollas 4–4.5(7) mm
Disk flowers ± 15; throat ± narrow
Fruit 2.5–4 mm, golden-brown, oblong; top generally truncate; pappus awns 2, ± 3/4 disk corolla
Chromosomes: 2n=24
Ecology: US. Wet clay of meadows, woodland borders
Elevation: ± 700 m.
Bioregional distribution: e Mojave Desert (Ash Meadows, Inyo Co.)
Distribution outside California: Nevada
Threatened by water diversion.

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bioregional map for GRINDELIA%20fraxino-pratensis being generated

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