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.

EUPHORBIACEAE

SPURGE FAMILY

Grady L. Webster, except as specified

Annual, perennial herb, shrub, tree, vine, monoecious or dioecious
Stem generally branched, sometimes fleshy or spiny
Leaves generally simple, alternate or opposite, generally stipuled, petioled; blade entire, toothed, or palmately lobed
Inflorescence: cyme, panicle, raceme, spike; flowers sometimes in clusters (dense, enclosed by involucre, flower-like in Chamaesyce, Euphorbia ), terminal or axillary
Flower unisexual, ± radial; sepals generally 3–5, free or fused; petals generally 0; stamens 1–many, free or filaments fused; ovary superior, chambers 1–4, styles free or fused, simple or lobed
Fruit: generally capsule
Seeds 1–2 per chamber; seed scar appendage sometimes present, pad- to dome-like
Genera in family: 300 genera, 7500 species: ± worldwide especially tropical; some cultivated (Aleurites , tung oil; Euphorbia subsp.; Hevea , rubber; Ricinus )
Reference: [Webster 1967 J Arnold Arbor 48:303–430]
Many species ± highly TOXIC.

CHAMAESYCE

PROSTRATE SPURGE

Daryl L. Koutnik

Annual, perennial herb, generally monoecious, glabrous to hairy; sap milky
Stem prostrate to erect, < 5 dm; branches alternate
Leaves cauline, opposite, short-petioled; stipules present; blade base generally asymmetric, veins dark green
Inflorescence flower-like, generally 1 per node; involucre ± bell-shaped, bracts 5, fused; glands 4, distal appendages generally colorful, petal-like; flowers central
Staminate flowers 3–many, generally in 5 clusters around pistillate flower, each flower a stamen
Pistillate flower 1, central, stalked; ovary chambers 3, ovule 1 per chamber, styles 3, separate or fused at base, divided to entire
Fruit: capsule, round to 3-angled or -lobed in X -section
Seed generally 4-angled, smooth or sculptured
Species in genus: ± 250 species: dry temp, subtropical worldwide, especially Am. Often treated as subg. of Euphorbia
Etymology: (Greek: ancient name for kind of prostrate plant)
Reference: [Wheeler 1941 Rhodora 43:97–154, 168–286]
Horticultural information: STBL.

Native

C. serpyllifolia (Pers.) Small

THYME-LEAFED SPURGE

Annual
Stem prostrate to ascending, glabrous to hairy
Leaf 3–14 mm; stipules separate, linear; blade ovate to oblong, glabrous to hairy, tip rounded, margin finely toothed
Inflorescence: involucre ± 1 mm, bell-shaped, glabrous to hairy; gland < 0.5 mm, oblong; appendage narrower than gland, entire to scalloped, white
Staminate flowers 5–18
Pistillate flower: style divided 1/2 length
Fruit 1.5–2 mm, ovoid, lobed, glabrous to hairy
Seed 1–1.5 mm, ovoid, smooth to wrinkled, white to brown
Ecology: Common. Dry habitats
Elevation: < 2500 m.
Bioregional distribution: California
Distribution outside California: to British Columbia, e N.America., Mexico
Synonyms: Euphorbia s. Pers

Native

subsp. hirtula (S. Watson) Koutnik


Stem hairy
Leaf 3–7 mm, hairy
Inflorescence: involucre hairy
Fruit hairy
Ecology: Dry places, woodland
Elevation: < 2500 m.
Bioregional distribution: c Sierra Nevada, Southwestern California
Distribution outside California: Baja California
Synonyms: Euphorbia s. Pers. var. h. (S. Watson) L.C. Wheeler

previous taxon | next taxon
bioregional map for CHAMAESYCE%20serpyllifolia%20subsp.%20hirtula 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 Chamaesyce serpyllifolia subsp. hirtula
Retrieve dichotomous key for Chamaesyce
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
Glossary
    FEEDBACK
  • 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