OregonFlora: Euphorbia glyptosperma vs. Euphorbia astyla

	Chamaesyce glyptosperma (synonym of Euphorbia glyptosperma)	Euphorbia astyla
	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
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Chamaesyce glyptosperma

(synonym of Euphorbia glyptosperma)

Euphorbia astyla

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]

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