Difference between revisions of "Euphorbia platysperma"
Bot. California 2: 482. 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 | ||
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|authority=Engelmann in W. H. Brewer et al. | |authority=Engelmann in W. H. Brewer et al. | ||
|rank=species | |rank=species | ||
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|publication year=1880 | |publication year=1880 | ||
|special status=Conservation concern | |special status=Conservation concern | ||
− | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V12/V12_814.xml |
|genus=Euphorbia | |genus=Euphorbia | ||
|section=Euphorbia sect. Anisophyllum | |section=Euphorbia sect. Anisophyllum |
Revision as of 20:00, 16 December 2019
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.