Euphorbia setiloba

Engelmann in War Department [U.S.]
Pacif. Railr. Rep. 5(2): 364. 1857.
Common names: Fringed or shaggy spurge Yuma sandmat
Illustrated
Synonyms: Chamaesyce setiloba (Engelmann) Millspaugh
Treatment appears in FNA Volume 12. Treatment on page 288. Mentioned on page 253.

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

V12 385-distribution-map.jpg

Ariz., Calif., Nev., N.Mex., Tex., Utah, Mexico (Baja California, Baja California Sur, Chihuahua, Durango, Sinaloa, Sonora).

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Euphorbia setiloba"
Victor W. Steinmann +, Jeffery J. Morawetz +, Paul E. Berry +, Jess A. Peirson +  and Ya Yang +
Engelmann in War Department [U.S.] +
Anisophyllum +
Fringed or shaggy spurge +  and Yuma sandmat +
Ariz. +, Calif. +, Nev. +, N.Mex. +, Tex. +, Utah +, Mexico (Baja California +, Baja California Sur +, Chihuahua +, Durango +, Sinaloa +  and Sonora). +
20–1600 m. +
Desert scrub, blackbrush scrub, Joshua tree woodlands, grasslands, often in sandy areas. +
Flowering nearly year-round in response to sufficient moisture. +
Pacif. Railr. Rep. +
Illustrated +
Chamaesyce setiloba +
Euphorbia setiloba +
Euphorbia sect. Anisophyllum +
species +