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currugate-seeded spurge, ribseed sandmat, ridge-seeded spurge

Habit Plants annual; stems prostrate, 4–40 cm, glabrous; taprooted.
Leaves

oblanceolate to elliptic or ovate, 3–10 mm, occasionally with central red spot;

margins entire to shallowly toothed;

tips rounded;

surfaces glabrous;

petioles 0.3–1 mm;

stipules linear, often dissected, 1–1.5 mm.

Inflorescences

involucres 0.5–1 mm, glabrous;

glands elliptic;

gland appendages white.

Fruits

ovoid, 1.5–2 mm, glabrous.

Seeds

ovoid, 1–1.5 mm; cross-ridged.

Chamaesyce glyptosperma

Euphorbia astyla

Distribution
[WildflowerSearch map]
[BONAP county map]
[BONAP county map]
Discussion

Dry areas, roadsides. Flowering Jun–Sep. 0–1600 m. BW, Col, ECas, Lava, Owy, Sisk, WV. CA, ID, NV, WA; southern Canada and most of US except southeastern states, Mexico. Native.

Source Flora of Oregon, volume 2, page 643
Stephen Meyers
Sibling taxa
C. glyptosperma, C. maculata, C. prostrata, C. serpens, C. serpillifolia
E. crenulata, E. cyparissias, E. dentata, E. esula, E. helioscopia, E. lathyris, E. myrsinites, E. oblongata, E. peplus, E. spathulata
Synonyms Euphorbia glyptosperma
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