Difference between revisions of "Euphorbia perennans"
SouthW. Naturalist 5: 170. 1960.
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|common_names=Terlingua spurge;perennial sandmat | |common_names=Terlingua spurge;perennial sandmat | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Chamaesyce perennans | |name=Chamaesyce perennans | ||
|authority=Shinners | |authority=Shinners | ||
| + | |rank=species | ||
| + | |publication_title=Field & Lab. | ||
| + | |publication_place=24: 38. 1956 | ||
}} | }} | ||
|synonyms= | |synonyms= | ||
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|elevation=900–1200 m. | |elevation=900–1200 m. | ||
|distribution=Tex.;Mexico (Chihuahua). | |distribution=Tex.;Mexico (Chihuahua). | ||
| − | |discussion=<p>Euphorbia perennans is a distinctive species with an erect habit and relatively large, firm, deltate midstem leaves. Phylogenetic data place E. perennans in a clade of primarily Chihuahuan Desert annual and perennial species (for example, E. chaetocalyx, E. fendleri, E. golondrina, E. simulans, E. spurca, and E. theriaca; Y. Yang and P. E. Berry 2011).</p><!-- | + | |discussion=<p><i>Euphorbia perennans</i> is a distinctive species with an erect habit and relatively large, firm, deltate midstem leaves. Phylogenetic data place <i>E. perennans</i> in a clade of primarily Chihuahuan Desert annual and perennial species (for example, <i>E. chaetocalyx</i>, <i>E. fendleri</i>, <i>E. golondrina</i>, <i>E. simulans</i>, E. spurca, and <i>E. theriaca</i>; Y. Yang and P. E. Berry 2011).</p><!-- |
| − | --><p>Euphorbia perennans is known in the flora area only from Brewster County.</p> | + | --><p><i>Euphorbia perennans</i> is known in the flora area only from Brewster County.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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name=Euphorbia perennans | name=Euphorbia perennans | ||
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|authority=(Shinners) Warnock & M. C. Johnston | |authority=(Shinners) Warnock & M. C. Johnston | ||
|rank=species | |rank=species | ||
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|publication year=1960 | |publication year=1960 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V12/V12_384.xml |
|genus=Euphorbia | |genus=Euphorbia | ||
|section=Euphorbia sect. Anisophyllum | |section=Euphorbia sect. Anisophyllum | ||
Latest revision as of 19:15, 5 November 2020
Herbs, perennial, with strongly thickened, woody rootstock. Stems erect, 7–45 cm, glabrous. Leaves opposite; stipules distinct, linear-filiform in (1–)2(–3) segments, 0.3–0.4 mm, glabrous; petiole 0.8–2 mm, glabrous; blade ovate or orbiculate-deltate to reniform-deltate, 5–17 × 4–16 mm midstem leaves largest, base symmetric, cuneate, rounded to cordate, margins entire, apex acute to rounded, surfaces glabrous, often glaucous; 3-veined from base, only midvein conspicuous. Cyathia solitary at distal nodes or at nodes of short, axillary branches; peduncle 1.8–3 mm. Involucre broadly-campanulate to hemispheric, 1.7–2.2 × 1.5–2.7 mm, glabrous; glands 4, green to yellow-green, elliptic to oblong, folded longitudinally, 0.3–0.5 × 0.7–1.4 mm; appendages absent. Staminate flowers 35–45. Pistillate flowers: ovary glabrous; styles 0.7–0.9 mm, 2-fid nearly entire length. Capsules subglobose to broadly ovoid, 2.8–3.3 × 2.8–3.4 mm, glabrous; columella 2.2–2.7 mm. Seeds white to light brown, ovoid, 3–4-angled in cross section, 2–2.4 × 1–1.2 mm, smooth to faintly transverse-wrinkled.
Phenology: Flowering and fruiting spring–fall.
Habitat: Desert scrub, on cretaceous and gypseous clay, limestone hills and flats.
Elevation: 900–1200 m.
Distribution
Tex., Mexico (Chihuahua).
Discussion
Euphorbia perennans is a distinctive species with an erect habit and relatively large, firm, deltate midstem leaves. Phylogenetic data place E. perennans in a clade of primarily Chihuahuan Desert annual and perennial species (for example, E. chaetocalyx, E. fendleri, E. golondrina, E. simulans, E. spurca, and E. theriaca; Y. Yang and P. E. Berry 2011).
Euphorbia perennans is known in the flora area only from Brewster County.
Selected References
None.