Euphorbia setiloba
Pacif. Railr. Rep. 5(2): 364. 1857.
Herbs, annual, with slender taproot. Stems prostrate, mat-forming, 5–50 cm, villous with glistening glandular-hairs. Leaves opposite; stipules distinct, filiform, rudimentary to 0.2 mm, glabrous or sparsely villous with glistening glandular-hairs; petiole 0.5–1.5 mm, villous; blade oblong, ovate, or elliptic, 3–7 × 2–4 mm, base asymmetric, rounded, margins entire, apex obtuse, surfaces villous; weakly 3-veined from base, commonly only midvein conspicuous. Cyathia solitary at distal nodes, nodes often congested toward tips of branches; peduncle 0.2–1.6 mm. Involucre campanulate or urceolate, 0.7–1 × 0.5–0.8 mm, villous; glands 4, red to pink, oblong to slightly reniform, 0.1–0.2 × 0.2–0.3 mm; appendages white to pink, deeply incised into 3–6 triangular to subulate, attenuate, acute segments, 0.3–0.6 × 0.6–1 mm, segments entire. Staminate flowers 3–7. Pistillate flowers: ovary villous; styles 0.3–0.4 mm, 2-fid 1/2 length. Capsules subglobose to ovoid, 1–1.2 mm diam., villous; columella 0.9–1.1 mm. Seeds pink to light gray, narrowly ovoid, 4-angled in cross-section, 0.8–1 × 0.5–0.6 mm, dimpled or with faint transverse ridges that do not pass through abaxial keel.
Phenology: Flowering nearly year-round in response to sufficient moisture.
Habitat: Desert scrub, blackbrush scrub, Joshua tree woodlands, grasslands, often in sandy areas.
Elevation: 20–1600 m.
Distribution
Ariz., Calif., Nev., N.Mex., Tex., Utah, Mexico (Baja California), Mexico (Baja California Sur), Mexico (Chihuahua), Mexico (Durango), Mexico (Sinaloa), Mexico (Sonora)
Discussion
Selected References
None.
Lower Taxa
"connate" is not a number. "distinct" is not a number."/2" is not declared as a valid unit of measurement for this property.