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.


Kenton L. Chambers

Annual, scapose; sap milky
Leaves ± basal, entire to pinnately lobed, glabrous or mealy (hairs drying as minute, white scales)
Inflorescence: heads, ligulate, solitary, ± drooping in bud; involucre glabrous; phyllaries ± lanceolate, outer < 1/3 X inner
Flowers 8–many; corollas readily withering, ± = involucre; ligules white or yellow, often reddish below
Fruit 10-ribbed, gray to brown or blackish; pappus scales 5, ± cut at tip, dull-white (silvery) to brownish, bristle-tip finely barbed
Etymology: (Greek: Stebbins' chicory, for G.L. Stebbins, Jr., Am geneticist, evolutionist, 1906–)
Reference: [Jansen et al. 1991 Amer J Bot 78:1015–1027]
Species in genus: 2 species: w North America. Derived by hybridization: Uropappus lindleyi X annual Microseris.


S. heterocarpa (Nutt.) K.L. Chambers

Plant 8–60 cm
Leaf 5–35 cm
Inflorescence: involucre 9–30 mm
Flowers: ligules yellow or white
Fruit 4.5–12 mm, generally blue- or red-violet to brown or gray (or blackish in SCo); pappus scales > or = fruit, sometimes hairy, midrib thicker at base, tapered, bristle 3.5–8 mm, arising from notched scale tip
Chromosomes: 2n=36
Ecology: Open, sometimes disturbed sites, rocky to clay soils, generally ± inland
Elevation: < 1000 m.
Bioregional distribution: North Coast Ranges, Sierra Nevada Foothills, San Joaquin Valley, Central Western California, South Coast, Channel Islands, Peninsular Ranges
Distribution outside California: n Mexico, se Arizona
Synonyms: Microseris h. (Nutt.) K.L. Chambers; M. lindleyi (DC.) A. Gray misapplied; Uropappus l. (DC.) Nutt. misapplied
Derived from Microseris douglasii X Uropappus l
Horticultural information: TRY.

previous taxon | next taxon
bioregional map for STEBBINSOSERIS%20heterocarpa 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 Stebbinsoseris heterocarpa
Retrieve dichotomous key for Stebbinsoseris
Retrieve multiple-entry key (MEKA) for Stebbinsoseris
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