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.


Species in genus: 1 sp
Etymology: (Greek: each enclosed, from 1-flowered heads)


H. shockleyi A. Gray

Stems 4–7 dm, stiff, much-branched, glandular-puberulent or becoming glabrous except for tufts of soft hair in axils of persistent leaf bases
Leaves simple, alternate, some also clustered in axils of older stems; primary leaves 1–3 cm, linear to linear-lanceolate, sessile, spine-tipped, sparsely spiny-dentate, ± persistent as spines when dry; clustered axillary leaves narrower, obtuse to acute, generally not toothed
Inflorescence: heads 1-flowered, sessile, in dense, head-like clusters surrounded by involucre of persistent, ovate, spiny-toothed, net-veined bracts 1–2 cm; true involucre narrowly cylindric; phyllaries ± 15 in several unequal series, 4–10 mm, linear, acuminate, loosely soft-hairy; receptacle naked
Flower 1 per head; corolla pink to reddish purple in bud, greenish white in flower, lobes linear, equal; filaments inserted near base of corolla, anthers purple, exserted, bases with stiff, bristle-like tails, tips short-triangular; style tips very shallowly lobed
Fruit cylindric, glabrous; pappus a crown of fringed scales < or = 1 mm
Chromosomes: 2n=16
Ecology: Dry, rocky slopes
Elevation: 1200–2200 m.
Bioregional distribution: East of Sierra Nevada, Desert Mountains
Distribution outside California: w Nevada
Flowering time: May–Jun

previous taxon | next taxon
bioregional map for HECASTOCLEIS%20shockleyi being generated

Retrieve Jepson Interchange Index to Plant Names entry for Hecastocleis shockleyi
Retrieve dichotomous key for Hecastocleis
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