Chamaesyce glyptosperma(synonym of Euphorbia glyptosperma) |
Chamaesyce serpillifolia |
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currugate-seeded spurge, ribseed sandmat, ridge-seeded spurge |
thyme-leaved spurge, thymeleaf sandmat |
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Habit | Plants annual; stems prostrate, 4–40 cm, glabrous; taprooted. | Plants annual; stems prostrate to ascending, 5–40 cm, glabrous, sometimes glaucous; 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. |
oblanceolate to oblong, 3–15 mm, occasionally with a central red spot; margins entire to shallowly toothed; tips rounded; surfaces glabrous; petioles 0.5–1.5 mm; stipules slender and entire to linear and dissected, 1–1.5 mm. |
Inflorescences | involucres 0.5–1 mm, glabrous; glands elliptic; gland appendages white. |
involucres 0.5–1 mm, glabrous; glands elliptic; gland appendages white. |
Fruits | ovoid, 1.5–2 mm, glabrous. |
spherical, 1–2 mm, glabrous. |
Seeds | ovoid, 1–1.5 mm; cross-ridged. |
ovoid, 0.9–1.3 mm; smooth to wrinkled. |
Chamaesyce glyptosperma |
Chamaesyce serpillifolia |
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Distribution | ||
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. |
Usually dry places but sometimes in wet areas, roadsides, disturbed areas. Flowering Jun–Sep. 0–1900 m. BR, BW, Casc, Col, ECas, Lava, Owy, Sisk, WV. CA, ID, NV, WA; southern Canada, most of US except southeast and parts of northeast, Mexico. Native. In California, some plants of this species have hairy stems, involucres, and fruits. These plants are accepted by some authorities as C. s. ssp. hirtula (ours, in turn, would be C. s. ssp. serpillifolia). Given the already small morphological differences between our species of Chamaesyce, we have chosen not to recognize the subspecies. |
Source | Flora of Oregon, volume 2, page 643 Stephen Meyers |
Flora of Oregon, volume 2, page 643 Stephen Meyers |
Sibling taxa | ||
Synonyms | Euphorbia glyptosperma | Chamaesyce serpillifolia ssp. serpillifolia, Euphorbia serpillifolia, Euphorbia serpillifolia ssp. serpillifolia |
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