Difference between revisions of "Euphorbia platysperma"
in W. H. Brewer et al., Bot. California 2: 482. 1880.
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|accepted_name=Euphorbia platysperma | |accepted_name=Euphorbia platysperma | ||
| − | |accepted_authority=Engelmann | + | |accepted_authority=Engelmann |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
| − | |title=Bot. California | + | |title=in W. H. Brewer et al., Bot. California |
|place=2: 482. 1880 | |place=2: 482. 1880 | ||
|year=1880 | |year=1880 | ||
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|name=Chamaesyce platysperma | |name=Chamaesyce platysperma | ||
|authority=(Engelmann) Shinners | |authority=(Engelmann) Shinners | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Euphorbiaceae;Euphorbia;Euphorbia sect. Anisophyllum;Euphorbia platysperma | |hierarchy=Euphorbiaceae;Euphorbia;Euphorbia sect. Anisophyllum;Euphorbia platysperma | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Euphorbia platysperma | name=Euphorbia platysperma | ||
| − | + | |authority=Engelmann | |
| − | |authority=Engelmann | ||
|rank=species | |rank=species | ||
|parent rank=section | |parent rank=section | ||
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|distribution=Ariz.;Calif.;Mexico (Baja California;Sonora). | |distribution=Ariz.;Calif.;Mexico (Baja California;Sonora). | ||
|reference=None | |reference=None | ||
| − | |publication title=Bot. California | + | |publication title=in W. H. Brewer et al., Bot. California |
|publication year=1880 | |publication year=1880 | ||
|special status=Conservation concern | |special status=Conservation concern | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V12/V12_814.xml |
|genus=Euphorbia | |genus=Euphorbia | ||
|section=Euphorbia sect. Anisophyllum | |section=Euphorbia sect. Anisophyllum | ||
Latest revision as of 20:17, 5 November 2020
Herbs, annual or short-lived perennial, with slender taproot. Stems prostrate, spreading and often mat-forming, 10–100 cm, glabrous. Leaves opposite; stipules usually distinct, occasionally connate basally, rarely to middle, subulate, narrowly triangular, or divided into 2–4 subulate segments, 0.5–1.1 mm, glabrous; petiole 1–3.6 mm, glabrous; blade oblong to obovate, 5–12 × 3–5 mm, base subsymmetric, cuneate to attenuate, margins entire, apex usually acute to mucronulate, rarely obtuse, surfaces glabrous; only midvein conspicuous. Cyathia solitary at distal nodes; peduncle 1.6–4.1 mm. Involucre campanulate to obconic, 1.5–2 × 1.3–2.5 mm, glabrous; glands 4, yellowish, subcircular to oblong, 0.5–0.6 × 0.5–0.6 mm; appendages white, ovate to oblong or almost triangular, 0.3–0.6 × 0.3–0.8 mm, distal margin entire or shallowly 2–3-lobed. Staminate flowers 45–50. Pistillate flowers: ovary glabrous, styles 0.4–0.6 mm, 2-fid 1/2 length. Capsules ovoid to ellipsoid, 2.7–3.2 × 2.2–2.9 mm, glabrous; columella 2.6–2.8 mm. Seeds whitish, pinkish, or light brown, ellipsoid-oblong, weakly dorsiventrally compressed and semielliptic in cross section, 2.2–2.5 × 1.3–1.6 mm, with sharp linelike longitudinal ridge on adaxial side, smooth and rounded on back.
Phenology: Flowering and fruiting year-round in response to sufficient moisture.
Habitat: Sand dunes in Sonoran Desert scrub.
Elevation: 60–200 m.
Distribution
Ariz., Calif., Mexico (Baja California, Sonora).
Discussion
Selected References
None.