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
For up-to-date information about California vascular plants, visit 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

Perennial from taproot; sap milky
Stems naked, hollow
Leaves all basal, toothed or lobed; lobes acute
Inflorescence: heads ligulate, solitary, scapose; phyllaries many, outer ovate to lanceolate, generally reflexed, inner erect, linear; receptacle convex, naked
Flowers many; ligules yellow, readily withering
Fruit fusiform; ribs rough; beak slender, >> body; pappus of many, white, slender bristles, not plumose. Many named species, mostly reproducing clonally by asexual seeds: Eurasia, CA
Etymology: (Greek: ancient name)
Reference: [Taylor 1987 Bull Torrey Bot Club 114:109–120]


T. officinale F.H. Wigg.

Leaves variously toothed or lobed
Inflorescence: heads 2–3.3 cm diam; outer phyllaries reflexed, 5–8 mm; tips of inner phyllaries acute to minutely truncate
Fruit grayish or olive-brown; body tubercled near tip
Chromosomes: 2n=16,24,48
Ecology: Abundant. Weed, especially of lawns, meadows
Elevation: 0–3300 m.
Bioregional distribution: California Floristic Province, Great Basin Floristic Province
Distribution outside California: native to Europe
Flowering time: Most of year
Synonyms: T. laevigatum (Willd.) DC

previous taxon | next taxon
bioregional map for TARAXACUM%20officinale being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Taraxacum officinale
Retrieve dichotomous key for Taraxacum
Retrieve multiple-entry key (MEKA) for Taraxacum
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
  • This page is no longer being maintained.

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