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.



G. Ledyard Stebbins

Perennial; sap milky; herbage generally long-hairy
Stems erect, 1–10 dm
Leaves basal or cauline, alternate
Inflorescence: heads ligulate, few–many in cymes or panicles; involucre cylindric; phyllaries in 2–4 series of different lengths; receptacle naked
Flowers few–many; ligules yellow, white, or orange, readily withering
Fruit cylindric, slender; pappus of many slender bristles, brittle, dull white, tawny, or brownish
Species in genus: ± 250 species: ± worldwide
Etymology: (Greek: hawk)
Many reproduce only by asexual seeds.


H. scouleri Hook.

Stolons 0
Stems 3–7 dm, simple, ± glabrous to bristly
Leaves: generally basal and lower cauline, 10–20 cm, lanceolate to oblanceolate, entire, sparsely to moderately long-hairy
Inflorescence glabrous to hairy or glandular; heads many, in cymes; involucre 8–10 mm, glandular-hairy
Flowers 15–50; ligules yellow
Fruit 3 mm; pappus dull brown
Chromosomes: 2n=18
Ecology: Open woods, shrubby places
Elevation: 450–2250 m.
Bioregional distribution: Klamath Ranges, High North Coast Ranges, High Cascade Range, n High Sierra Nevada, Great Basin Floristic Province
Distribution outside California: to British Columbia, Montana
Flowering time: May–Jul
Plants with naked stems and many, dark, glandular hairs have been called var. nudicaule (A. Gray) Cronquist
Synonyms: H. cynoglossoides Arv.-Touv. misapplied to CA plants
Horticultural information: DRN: 4, 5, 6, 15, 16, 17 &SHD: 1, 2, 7, 8, 9, 10, 14, 18, 19, 20, 21, 22, 23, 24.

previous taxon | next taxon
bioregional map for HIERACIUM%20scouleri being generated

Retrieve Jepson Interchange Index to Plant Names entry for Hieracium scouleri
Retrieve dichotomous key for Hieracium
Retrieve multiple-entry key (MEKA) for Hieracium
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