Euphorbia cordifolia


Sketch. Bot. S. Carolina 2: 656. 1824.

Common names: Heartleaf sandmat
Synonyms: Chamaesyce cordifolia (Elliott) Small
Treatment appears in FNA Volume 12. Treatment on page 265. Mentioned on page 258.

Herbs, annual, with taproot. Stems prostrate, occasionally mat-forming, 10–43 cm, glabrous. Leaves opposite; stipules usually distinct, occasionally connate at base, filiform, 1–1.2(–2.8) mm, usually glabrous, rarely pilose; petiole 0.4–1 mm, usually glabrous; blade ovate to oblong, 4.4–12 × 2.6–7.6 mm, base asymmetric, cordate to rounded, margins entire, apex rounded to mucronulate, surfaces glabrous; only midvein conspicuous. Cyathia solitary at distal nodes; peduncle 0.9–3 mm. Involucre campanulate, 1–1.3 × 1–1.3 mm, glabrous; glands 4, yellowish to pink, elliptic, 0.3–0.5 × 0.5–1 mm; appendages whitish to pink, sometimes drying red, elliptic to ovoid, 1.1–1.5 × 1.2–1.9 mm, distal margin entire, retuse, or erose. Staminate flowers 5–40. Pistillate flowers: ovary glabrous; styles 0.5–0.8 mm, 2-fid nearly entire length. Capsules ovoid, 2–3 mm diam., glabrous; columella 1.2–2.7 mm. Seeds gray or tan with dark brown mottling, ovoid, bluntly 3–4-angled in cross section, 1.8–2.1 × 1.2–1.4 mm, smooth to rugose.

Phenology: Flowering and fruiting summer–fall.
Habitat: Xeric oak-pine scrub, pine-barrens, sand barrens, sandy stream banks.
Elevation: 0–200 m.


V12 508-distribution-map.jpg

Ala., Ark., Fla., Ga., La., Miss., N.C., Okla., S.C., Tex.


Euphorbia cordifolia is easily identified by its cordate to rounded leaf base and distinctive filiform stipules.

Selected References


Lower Taxa

... more about "Euphorbia cordifolia"
Victor W. Steinmann +, Jeffery J. Morawetz +, Paul E. Berry +, Jess A. Peirson +  and Ya Yang +
Elliott +
Anisophyllum +
Heartleaf sandmat +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, Okla. +, S.C. +  and Tex. +
0–200 m. +
Xeric oak-pine scrub, pine-barrens, sand barrens, sandy stream banks. +
Flowering and fruiting summer–fall. +
Sketch. Bot. S. Carolina +
Chamaesyce cordifolia +
Euphorbia cordifolia +
Euphorbia sect. Anisophyllum +
species +