Euphorbia cuphosperma

(Engelmann) Boissier in A. P. de Candolle and A. L. P. P. de Candolle

Prodr. 15(2): 73. 1862.

Common names: Hairy-fruit spurge
Weedy
Basionym: Euphorbia dentata var. cuphosperma Engelmann in W. H. Emory Rep. U.S. Mex. Bound. 2(1): 190. 1859
Synonyms: Poinsettia cuphosperma (Engelmann) Small
Treatment appears in FNA Volume 12. Treatment on page 319. Mentioned on page 318.

Herbs, annual, with taproot. Stems erect, 13–20 cm, both pilose to villous and densely strigillose; branches ± straight. Leaves usually opposite, occasionally alternate at distal nodes; petiole 3–15 mm, pilose; blade narrowly to broadly elliptic, or lanceolate to ovate, 30–80 × 10–15 mm, base cuneate to rounded, margins coarsely crenate-dentate, strigose, revolute to nearly flat, apex broadly acute to acuminate, or obtuse, abaxial surface pilose, adaxial surface sparsely strigose-hirsute; venation pinnate, midvein prominent. Cyathial arrangement: terminal pleiochasial branches usually 3, occasionally reduced to congested cyme, 1–2-branched; pleiochasial bracts 2–4, often whorled, wholly green or paler green at base, similar in shape and size to distal leaves or slightly narrower; dichasial bracts highly reduced. Cyathia: peduncle 0.5–0.8 mm. Involucre campanulate to slightly cylindric, 2.3 × 1.2 mm, glabrous; involucral lobes divided into several linear, smooth lobes; gland 1, yellow-green, stipitate, clavate, 1–1.2 × 0.8–0.9 mm, opening bilabiate and oblong, glabrous; appendages absent. Staminate flowers 3–5. Pistillate flowers: ovary pilose; styles 1.2 mm, 2-fid nearly entire length. Capsules broadly ovoid, 2.2–3 × 1.9–2.7 mm, 3-lobed, pilose; columella 2–2.4 mm. Seeds gray-brown to pale gray, pyramidally ovoid, angular in cross-section, 2.3–2.6 × 2.4–2.6 mm, coarsely tuberculate, tubercles in 2 transverse rows; caruncle 0.2–0.4 mm. 2n = 56.


Phenology: Flowering and fruiting summer–fall.
Habitat: Open montane and canyon forests, pinyon-juniper forests, montane grasslands, stream beds, disturbed habitats.
Elevation: 800–2000 m.

Distribution

V12 567-distribution-map.jpg

Ariz., N.Mex., Mexico, Central America (Guatemala)

Discussion

Selected References

None.

Lower Taxa

None.

"narrower" is not a number."connate" is not a number. "distinct" is not a number."entire" is not a number.

... more about "Euphorbia cuphosperma"
broadly acute;acuminate or obtuse +
Jess A. Peirson +, Paul E. Berry +  and Victor W. Steinmann +
(Engelmann) Boissier in A. P. de Candolle and A. L. P. P. de Candolle +
connate +
cuneate +  and rounded +
Euphorbia dentata var. cuphosperma +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
lanceolate;ovate +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
dichasial +  and pleiochasial +
paler green +  and green +
distinct +
2 +  and 4 +
reduced +
cymose +, few-branched +, unbranched +  and pleiochasial +
arranged +  and opposite +
additional +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
3-lobed +  and ovoid +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.27 cm2.7 mm <br />0.0027 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
Hairy-fruit spurge +
Ariz. +, N.Mex. +, Mexico +  and Central America (Guatemala) +
800–2000 m. +
pistillate +  and staminate +
bilabiate +  and stipitate +
yellow-green +
1mm;1.2mm +
subtending +
oblong +  and clavate +
0.8mm +  and 0.9mm +
Open montane and canyon forests, pinyon-juniper forests, montane grasslands, stream beds, disturbed habitats. +
axillary +  and terminal +
2.3 cm23 mm <br />0.023 m <br /> (?) +
campanulate +  and slightly cylindric +
1.2 cm12 mm <br />0.012 m <br /> (?) +
alternate +  and opposite +
caducous +, deciduous +  and persistent +
bractlike +
involucral +
divided +
palmate +  and pinnate +
revolute +  and nearly flat +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
connate;distinct +
0.3 cm3 mm <br />0.003 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering and fruiting summer–fall. +
gray-brown;pale gray +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
tuberculate +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
free +, connate +  and distinct +
strigillose +, pilose +  and villous +
13 cm130 mm <br />0.13 m <br /> (20 cm200 mm <br />0.2 m <br />) +
deciduous +  and persistent +
distinct +
1.2 cm12 mm <br />0.012 m <br /> (?) +
hairy +  and glabrous +
Poinsettia cuphosperma +
Euphorbia cuphosperma +
Euphorbia sect. Poinsettia +
species +
1-2-branched +  and pleiochasial +