Euphorbia lata

Engelmann

in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 188. 1859.

Common names: Broadleaf spurge
Basionym: Euphorbia dilatata Torrey & A. Gray in War Department [U.S.], Pacif. Railr. Rep. 2(4): 175. 1857
Synonyms: Chamaesyce lata (Engelmann) Small E. rinconis M. E. Jones
Treatment appears in FNA Volume 12. Treatment on page 275. Mentioned on page 254.

Herbs, perennial, with moderately thickened to robust rootstock. Stems ascending to erect, or prostrate, 10–25 cm, strigose to short-sericeous or ± villous. Leaves opposite; stipules distinct, filiform, 0.8–1.3 mm, strigose to short-sericeous or ± villous; petiole 0.5–2 mm, densely strigose to short-sericeous or ± villous; blade narrowly to broadly ovate-deltate, older ones often falcate, 4–12 × 3–7 mm, base asymmetric, obliquely rounded to obtuse, noticeably wider on one side, margins entire, often ± revolute, apex broadly acute, surfaces strigose to short-sericeous or ± villous; obscurely 3–5-veined from base, midvein prominent abaxially. Cyathia solitary at distal nodes; peduncle 1–3 mm. Involucre broadly campanulate, 2–2.5 × 2.2–2.6, strigose; glands 4, greenish, oblong to semilunate, 0.2–0.7 × 0.6–1 mm; appendages rudimentary or white, forming narrow band, (0–)0.1–0.2 × (0–)0.6–1 mm, distal margin entire or crenate. Staminate flowers 25–35. Pistillate flowers: ovary densely strigose to short-sericeous or ± villous; styles dark purplish, 0.8–1.2 mm, 2-fid 1/2 to nearly entire length. Capsules ovoid, 1.9–2.3 × 2–2.4 mm, strigose to short-sericeous or ± villous; columella 1.7–2.2 mm. Seeds whitish, oblong, 4-angled in cross section, faces concave, 1.5–1.8(–2) × 0.6–0.9 mm, smooth. 2n = 28, 56.


Phenology: Flowering and fruiting spring–fall.
Habitat: Mountain slopes, canyons, basins, rocky prairies, roadsides, disturbed sites, usually in calcareous soils, sometimes in igneous-derived, sandy or rocky soils.
Elevation: 600–2200 m.

Distribution

V12 559-distribution-map.jpg

Colo., Kans., N.Mex., Okla., Tex., Mexico (Chihuahua, Coahuila).

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Euphorbia lata"
Victor W. Steinmann +, Jeffery J. Morawetz +, Paul E. Berry +, Jess A. Peirson +  and Ya Yang +
Engelmann +
Euphorbia dilatata +
Broadleaf spurge +
Colo. +, Kans. +, N.Mex. +, Okla. +, Tex. +, Mexico (Chihuahua +  and Coahuila). +
600–2200 m. +
Mountain slopes, canyons, basins, rocky prairies, roadsides, disturbed sites, usually in calcareous soils, sometimes in igneous-derived, sandy or rocky soils. +
Flowering and fruiting spring–fall. +
in W. H. Emory, Rep. U.S. Mex. Bound. +
Chamaesyce lata +  and E. rinconis +
Euphorbia lata +
Euphorbia sect. Anisophyllum +
species +