View source for Euphorbia chamaesula

{{Treatment/ID
|accepted_name=Euphorbia chamaesula
|accepted_authority=Boissier
|publications={{Treatment/Publication
|title=Cent. Euphorb.,
|place=38. 1860
|year=1860
}}
|common_names=Mountain spurge
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Tithymalus chamaesula
|authority=(Boissier) Wooton & Standley
|rank=species
}}
|hierarchy=Euphorbiaceae;Euphorbia;Euphorbia subg. Esula;Euphorbia chamaesula
|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>subgenus</small>[[Euphorbia subg. Esula]]</div><div class="higher-taxon"><small>species</small>[[Euphorbia chamaesula]]</div></div>
|volume=Volume 12
|mention_page=page 296, 313
|treatment_page=page 300
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial, with thick rootstock. <b>Stems</b> erect, branched, 40–90 cm, glabrous. <b>Leaves</b>: petiole 0.5–1 mm; blade elliptic to oblong, 8–20(–40) × 3–6 mm, base truncate, rounded, or attenuate, margins entire, apex obtuse or acute, sometimes slightly mucronate, surfaces glabrous; venation inconspicuous, only midvein prominent. <b>Cyathial</b> arrangement: terminal pleiochasial branches 3–5(–6), each 3–4 times 2-branched; pleiochasial bracts ovate-lanceolate to slightly subpandurate, similar in size or wider than distal leaves; dichasial bracts distinct, lanceolate to broadly ovate, base usually truncate to rounded or subcordate, sometimes attenuate, margins entire or slightly crenulate, apex usually obtuse to acute, occasionally acuminate; axillary cymose branches 2–8. <b>Cyathia</b>: peduncle 1–3 mm. <b>Involucre</b> turbinate or campanulate, 1.5–2.5 × 1.1–1.9 mm, glabrous; glands 4, crescent-shaped to semicircular, 0.5–0.8 × 1–1.8 mm; horns usually convergent, 0.2–0.8 mm. <b>Staminate</b> flowers 8–12. <b>Pistillate</b> flowers: ovary glabrous; styles 1–1.8 mm, 2-fid. <b>Capsules</b> depressed-ovoid, 4.3–5 × 5–6 mm, 3-lobed; cocci rounded, smooth, glabrous; columella 3.5–4 mm. <b>Seeds</b> gray to dark brown, ovoid-oblong, truncate at both ends, 2.6–3.4 × 2–2.6 mm, shallowly pitted to almost smooth; caruncle conic, 1 × 0.8 mm. <b>2n</b> = 26.</span><!--

-->{{Treatment/Body
|phenology=Flowering and fruiting spring–summer.
|habitat=Clearings in ponderosa pine forests, montane roadsides, dry streambeds, creek banks, sandy and gravelly soils.
|elevation=1700–2700 m.
|distribution=Ariz.;N.Mex.;Mexico (Chihuahua;Sonora).
|discussion=<p><i>Euphorbia chamaesula</i> is easily distinguished from other perennial members of subg. Esula in western North America by its larger capsules and the vegetative shoots (without cyathia) that arise from the distal nodes of the stem proximal to the pleiochasia.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Euphorbia chamaesula
|authority=Boissier
|rank=species
|parent rank=subgenus
|synonyms=Tithymalus chamaesula
|basionyms=
|family=Euphorbiaceae
|phenology=Flowering and fruiting spring–summer.
|habitat=Clearings in ponderosa pine forests, montane roadsides, dry streambeds, creek banks, sandy and gravelly soils.
|elevation=1700–2700 m.
|distribution=Ariz.;N.Mex.;Mexico (Chihuahua;Sonora).
|reference=None
|publication title=Cent. Euphorb.,
|publication year=1860
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V12/V12_36.xml
|genus=Euphorbia
|subgenus=Euphorbia subg. Esula
|species=Euphorbia chamaesula
}}<!--

-->[[Category:Treatment]][[Category:Euphorbia subg. Esula]]