E-Flora BC: Electronic Atlas of the Flora of British Columbia

Chamaesyce glyptosperma (Engelm.) Small
corrugate-seeded spurge (ribseed sandmat)
Euphorbiaceae (Spurge family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #14560)

E-Flora BC Static Map
Distribution of Chamaesyce glyptosperma
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Species Information

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Annual herb from a fibrous root; stems prostrate, freely branched, often mat-forming, glabrous, with milky juice, 5-40 cm long.
Stem leaves opposite, lanceolate to oblong, 5-15 mm long, scalloped-toothed to entire, stipules linear, segmented unequally, 1 mm long.
Inflorescence of several involucres solitary in leaf-axils; involucres axillary, top-shaped, 1 mm long; glands 5, 4 pinkish and depressed in the centre with whitish appendages, the fifth a short fringed lobe.
Capsules, glabrous, 1.5 mm long; seeds 1.2 mm long, greyish, somewhat prismatic, coarsely wrinkled with transverse corrugations, mucilaginous when wet.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry disturbed areas, meadows and open forests in the lowland, steppe and montane zones; frequent in SC BC, less frequent in SW and SE BC; E to PQ and NB; S to MO, OH, TX, CA and MX.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Chamaesyce glyptosperma

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 335 350 365
Slope Gradient (%) 9 9 9
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
90 145 202
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BG(2)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Euphorbia glyptosperma Engelm.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References