Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
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.


Leaves simple, alternate, sessile or petioled; blade long, entire or toothed, generally ± glandular
Inflorescence: heads discoid (but often appearing radiate), sessile or short-peduncled, in flat-topped or panicle-like cymes; involucre cylindric; phyllaries generally in 1 series, linear, keeled; receptacle flat, short-hairy
Flowers few–many; corolla yellow, 2-lipped, outer lip spreading, ligule-like, 3-lobed, sometimes recurved, inner lip 2-lobed, recurved or coiled; anthers exserted, base with tail-like appendages, tip oblong, acute; style tips truncate
Fruit ± cylindric, 5-ribbed, black or brown, short-hairy and glandular; pappus of many bristles
Species in genus: ± 65 species: North America, South America
Etymology: (Greek: 3-fold, from outer corolla lip)
Reference: [Anderson 1972 Mem NY Bot Gard 22(3):1–68]


T. californica Kellogg var. californica

Plant glandular and short-hairy
Stems 2–20 dm, erect, stiff, much-branched
Leaves many; petiole 1.5–5 mm, winged; blade 2–11 cm, linear-lanceolate to lanceolate, acute at both ends, entire or serrate, margin often rolled under
Inflorescence: peduncles generally < or = 5 mm, bearing 5–7 bracts; phyllaries 8–10, 8–14 mm, green, tips acute
Flowers 11–25; corolla glandular, tube 6–9 mm, outer lip 5–8 mm, spreading, inner lip 4–5.5 mm, generally coiled
Fruit 6–10.5 mm; pappus 7.5–12 mm, dull white
Chromosomes: 2n=54
Ecology: Dry, rocky slopes, washes, desert flats
Elevation: generally < 1000 m.
Bioregional distribution: Desert
Distribution outside California: to Texas, n Mexico
Horticultural information: DRN, DRY, SUN: 10, 11, 12, 13, 19, 20, 21, 22, 23, 24.

previous taxon | next taxon
bioregional map for TRIXIS%20californica%20var.%20californica being generated

Retrieve Jepson Interchange Index to Plant Names entry for Trixis californica var. californica
Retrieve dichotomous key for Trixis
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California