View source for Euphorbia perennans

{{Treatment/ID
|accepted_name=Euphorbia perennans
|accepted_authority=(Shinners) Warnock & M. C. Johnston
|publications={{Treatment/Publication
|title=SouthW. Naturalist
|place=5: 170. 1960
|year=1960
}}
|common_names=Terlingua spurge;perennial sandmat
|basionyms={{Treatment/ID/Basionym
|name=Chamaesyce perennans
|authority=Shinners
|publication_title=Field &amp; Lab.
|publication_place=24: 38. 1956
}}
|synonyms=
|hierarchy=Euphorbiaceae;Euphorbia;Euphorbia sect. Anisophyllum;Euphorbia perennans
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Euphorbiaceae]]</div><div class="higher-taxon"><small>genus</small>[[Euphorbia]]</div><div class="higher-taxon"><small>section</small>[[Euphorbia sect. Anisophyllum]]</div><div class="higher-taxon"><small>species</small>[[Euphorbia perennans]]</div></div>
|volume=Volume 12
|mention_page=page 257, 270
|treatment_page=page 282
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial, with strongly thickened, woody rootstock. <b>Stems</b> erect, 7–45 cm, glabrous. <b>Leaves</b> 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. <b>Cyathia</b> solitary at distal nodes or at nodes of short, axillary branches; peduncle 1.8–3 mm. <b>Involucre</b> 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. <b>Staminate</b> flowers 35–45. <b>Pistillate</b> flowers: ovary glabrous; styles 0.7–0.9 mm, 2-fid nearly entire length. <b>Capsules</b> subglobose to broadly ovoid, 2.8–3.3 × 2.8–3.4 mm, glabrous; columella 2.2–2.7 mm. <b>Seeds</b> white to light brown, ovoid, 3–4-angled in cross section, 2–2.4 × 1–1.2 mm, smooth to faintly transverse-wrinkled.</span><!--

-->{{Treatment/Body
|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=<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><i>Euphorbia perennans</i> is known in the flora area only from Brewster County.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Euphorbia perennans
|author=
|authority=(Shinners) Warnock & M. C. Johnston
|rank=species
|parent rank=section
|synonyms=
|basionyms=Chamaesyce perennans
|family=Euphorbiaceae
|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).
|reference=None
|publication title=SouthW. Naturalist
|publication year=1960
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V12/V12_384.xml
|genus=Euphorbia
|section=Euphorbia sect. Anisophyllum
|species=Euphorbia perennans
}}<!--

-->[[Category:Treatment]][[Category:Euphorbia sect. Anisophyllum]]