Euphorbia villifera |
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hairy spurge |
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Habit | Herbs, annual or perennial, with slender taproot or thickened, woody rootstock. |
Stems | usually erect to ascending, rarely prostrate to decumbent, 10–30 cm, papillate, usually villous, sometimes glabrous. |
Leaves | opposite; stipules distinct, filiform, usually undivided, rarely divided into 2–3 segments), 0.3–0.7 mm, glabrous, papillate; petiole 0.6–1.8 mm, usually villous, rarely glabrous; blade ovate, 3–12 × 2–10 mm, base asymmetric, rounded to slightly cordate, margins entire or serrulate, apex acute to obtuse, surfaces usually villous, rarely glabrous; only midvein conspicuous. |
Involucre | campanulate, 0.7–0.9 × 0.6–1 mm, glabrous or pilose; glands 4, pink, oval, oblong, or trapezoidal, 0.1–0.2 × 0.2 mm; appendages white to pink, flabellate, oblong, ovate, or nearly rectangular, 0.2–0.4 × 0.2–0.6 mm, distal margin entire. |
Staminate flowers | 10–25. |
Pistillate flowers | ovary glabrous; styles 0.3–0.5 mm, 2-fid 1/2 to nearly entire length. |
Capsules | oblate-deltoid, cocci often elongated and terminating in an empty portion, 1.5–2 × 2.1–3.1 mm, glabrous; columella 0.9–1.5 mm. |
Seeds | gray-brown to red-brown, ovoid-oblong, weakly 4-angled in cross section, 1–1.4 × 0.6–0.8 mm, smooth, faintly rugose, or with inconspicuous transverse ridges. |
Cyathia | solitary at distal nodes; peduncles 0–1.8 mm. |
Euphorbia villifera |
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Phenology | Flowering and fruiting early spring–early winter. |
Habitat | Riparian forests with walnuts and sycamores, juniper woodlands, pine-oak woodlands, mostly on limestone substrates. |
Elevation | 100–1400 m. (300–4600 ft.) |
Distribution |
TX; Mexico; Central America |
Discussion | Although Euphorbia villifera has been reported from New Mexico (W. C. Martin and C. R. Hutchins 1980), no vouchers to verify its presence there were located. In Texas, E. villifera is known from the Edwards Plateau westward into the trans-Pecos region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 293. |
Parent taxa | Euphorbiaceae > Euphorbia > sect. Anisophyllum |
Sibling taxa | |
Synonyms | Chamaesyce stanfieldii, C. villifera, E. stanfieldii, E. villifera var. nuda |
Name authority | Scheele: Linnaea 22: 153. (1849) |
Web links |