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), Mexico (Coahuila)

Discussion

Selected References

None.

Lower Taxa

None.

"connate" is not a number. "distinct" is not a number."/2" is not declared as a valid unit of measurement for this property.

... more about "Euphorbia lata"
0 cm0 mm <br />0 m <br /> (0.01 cm0.1 mm <br />1.0e-4 m <br />) +
0 cm0 mm <br />0 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Victor W. Steinmann +, Jeffery J. Morawetz +, Paul E. Berry +, Jess A. Peirson +  and Ya Yang +
Engelmann in W. H. Emory +
pinnate +, symmetric +  and asymmetric +
obliquely rounded +  and obtuse +
Euphorbia dilatata +
0.4 cm4 mm <br />0.004 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
falcate;ovate-deltate +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
strigose +  and short-sericeous or more or less villous +
0.2 cm2 mm <br />0.002 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Broadleaf spurge +
crenate +  and entire +
Colo. +, Kans. +, N.Mex. +, Okla. +, Tex. +, Mexico (Chihuahua) +  and Mexico (Coahuila) +
600–2200 m. +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
concave +
0.6mm;0.9mm +
pistillate +  and staminate +
0.2mm;0.7mm +
subtending +
oblong +  and semilunate +
0.6mm +  and 1mm +
Mountain slopes, canyons, basins, rocky prairies, roadsides, disturbed sites, usually in calcareous soils, sometimes in igneous-derived, sandy or rocky soils. +
axillary +  and terminal +
campanulate +
caducous +, deciduous +  and persistent +
bractlike +
palmate +  and pinnate +
toothed +  and entire +
densely strigose;short-sericeous or more or less villous +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
connate;distinct +
densely strigose +  and short-sericeous or more or less villous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Flowering and fruiting spring–fall. +
Rep. U.S. Mex. Bound. +
4-angled +  and oblong +
free +, connate +  and distinct +
ascending +  and erect or prostrate +
strigose +  and short-sericeous or more or less villous +
flattened +  and terete +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
interpetiolar +
strigose +  and short-sericeous or more or less villous +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
dark purplish +
connate +  and distinct +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (?) +  and 0.12 cm1.2 mm <br />0.0012 m <br /> (?) +
strigose +  and short-sericeous or more or less villous +
Chamaesyce lata +  and E. rinconis +
Euphorbia lata +
Euphorbia sect. Anisophyllum +
species +
axillary +  and terminal +
10 +, 9 +, 8 +, 7 +  and 6 +