Euphorbia polycarpa Benth.

Family: Euphorbiaceae

Pertinent Synonyms & Notes (particularly those used in California; go to GRIN for other synonyms)

Chamaesyce polycarpa (Benth.) Millsp.

Pertinent Common Names (particularly those used in California; go to GRIN for other common names)

smallseed sandmat

Primary Disseminule Type


Description (diagnostics are in brown)

Fruit a capsule, nearly globose, three-lobed, three-chambered (one seed per chamber), 1–1.5 mm long, glabrous or hairy.

Seed ovate to lanceolate in outline, cross-section sharply 4-angled, sharply truncate (and often sunken) at chalazal end, 1–1.5 mm long x ca. 0.5 mm wide. Surface semiglossy, glabrous, smooth (sometimes slightly wrinkled), cobblestone-like (seen under magnification), white with purplish undertones to brown. Caruncle absent. A prominent seam (raphe) on the ventral side connects the hilum to the chalazal area.

Hilum darker than testa, ± round.

Similar Species

Similar Species Comparison Chart

Risk Assessment (codes in yellow or red indicate cause for concern; assessments are current as of mid-2011; click AUQP, NZBORIC, or NZBPI for access to the most recent versions of these databases and possible assessment changes)