Annual herb from a fibrous root; stems prostrate, softly hairy to bristly, with milky juice, 10-40 cm long.
Stem leaves opposite, obliquely oblong, 5-15 mm, long, often with a deep red central spot, somewhat toothed, hairy beneath, glabrous above; stipules linear, 0.5 mm long.
Inflorescence of several involucres solitary in the leaf-axils; involucres 1 mm long, stiffly-hairy, triangular-shaped; glands 4, yellow, conspicuous membranous appendages kidney-shaped, white to deep pink.
Capsules, 1.5 mm long, hairy; seeds 1 mm long, pinkish, sticky when wet, ridged and cross-corrugated.
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia
Synonyms and Alternate Names:
Chamaesyce mathewsii Small
Chamaesyce preslii (Guss.) Arthur
Chamaesyce supina (Raf.) H. Hara
Chamaesyce tracyi Small
Euphorbia maculata auct. non L.
Euphorbia maculata L.
Euphorbia nutans Lag.
Euphorbia preslii Guss.
Euphorbia supina Raf.