Euphorbia conferta

(Small) B. E. Smith

J. Elisha Mitchell Sci. Soc. 62: 82. 1946.

Common names: Everglade Key sandmat
Basionym: Chamaesyce conferta Small Fl. S.E. U.S., 713, 1333. 1903
Treatment appears in FNA Volume 12. Treatment on page 264. Mentioned on page 252.

Herbs, annual, with taproot. Stems prostrate, ascending, to erect, 10–45 cm, pilose. Leaves opposite; stipules distinct, subulate, 1–2 mm, pilose; petiole 0.9–1.5 mm, pilose; blade oblanceolate to elliptic, 3–10 × 1–4 mm, base asymmetric, obtuse to hemicordate, margins coarsely serrate, sometimes revolute, apex rounded to acute, abaxial surface sparsely hispidulous to strigillose (densely so on young leaves), adaxial surface glabrous; 3-veined from base but only midvein conspicuous. Cyathia solitary at distal nodes (appearing clustered at points of new growth); peduncle 0.4–0.6 mm. Involucre campanulate, 1.1–1.4 × 0.5–0.7 mm, pilose; glands 4, red, narrowly reniform, 0.1 × 0.2–0.4 mm; appendages pink to red, larger 2 petal-like, smaller 2 elliptic, 0.4–1 × 0.3–0.5 mm, distal margin erose. Staminate flowers 5–8. Pistillate flowers: ovary pilose; styles 0.4–0.8 mm, 2-fid at apex. Capsules conic or truncate-ovoid, 1–1.2 mm diam., pilose; columella 0.9–1.1 mm. Seeds orange-brown, glaucous, oblong, 4-angled in cross section, 0.7–0.8 × 0.4–0.5 mm, slightly rugose and with 3–4 transverse ridges.

Phenology: Flowering and fruiting year-round.
Habitat: Sandy, disturbed, wet areas, often roadsides.
Elevation: 0–10 m.


Euphorbia conferta is known only from Broward, Miami-Dade, and Monroe counties in southern Florida.

Selected References


Lower Taxa

... more about "Euphorbia conferta"
Victor W. Steinmann +, Jeffery J. Morawetz +, Paul E. Berry +, Jess A. Peirson +  and Ya Yang +
(Small) B. E. Smith +
Chamaesyce conferta +
Everglade Key sandmat +
0–10 m. +
Sandy, disturbed, wet areas, often roadsides. +
Flowering and fruiting year-round. +
J. Elisha Mitchell Sci. Soc. +
Chamaesyce +
Euphorbia conferta +
Euphorbia sect. Anisophyllum +
species +