View source for Euphorbia helleri

{{Treatment/ID
|accepted_name=Euphorbia helleri
|accepted_authority=Millspaugh
|publications={{Treatment/Publication
|title=Bot. Gaz.
|place=26: 268, fig. [p. 270]. 1898
|year=1898
}}
|common_names=Heller’s spurge
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Tithymalus helleri
|authority=(Millspaugh) Small
|rank=species
}}
|hierarchy=Euphorbiaceae;Euphorbia;Euphorbia subg. Esula;Euphorbia helleri
|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 helleri]]</div></div>
|volume=Volume 12
|mention_page=page 296, 304
|treatment_page=page 303
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> annual, with taproot. <b>Stems</b> ascending, branched proximally, 15–30 cm, glabrous. <b>Leaves</b>: petiole usually 1–3 mm, absent distally; blade spatulate, 6–15 × 3–5 mm, base broadly attenuate, margins entire, apex usually obtuse to rounded, sometimes retuse, surfaces glabrous; venation pinnate, midvein prominent. <b>Cyathial</b> arrangement: terminal pleiochasial branches 3, each 1–5 times 2-branched; pleiochasial bracts oblong, similar in size to distal leaves; dichasial bracts distinct, orbiculate-ovate to nearly reniform, subpandurate, base broadly cuneate to truncate, margins entire, apex obtuse, mucronate; axillary cymose branches 0–5. <b>Cyathia</b>: peduncle 0.2–0.4 mm. <b>Involucre</b> campanulate, 0.9–1.2 × 0.7–1 mm, glabrous; glands 4, elliptic, 0.1–0.2 × 0.3–0.4 mm; horns slightly divergent, 0.1–0.2 mm. <b>Staminate</b> flowers 8–10. <b>Pistillate</b> flowers: ovary glabrous; styles 0.4–0.5 mm, 2-fid. <b>Capsules</b> depressed-globose, 2.1–2.5 × 2.5–3 mm, 3-lobed; cocci flattened, smooth, glabrous; columella 1.2–1.7 mm. <b>Seeds</b> white to light gray, ovoid, 1.4–1.6 × 1–1.2 mm, smooth; caruncle 2-lobed, thin, 0.4 × 0.7 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering and fruiting late winter–spring.
|habitat=Forests, stream banks, roadsides, shaded areas with sandy, calcareous soils.
|elevation=0–50 m.
|distribution=La.;Tex.;Mexico (Nuevo León).
|discussion=<p>The smooth, white to light gray seeds of <i>Euphorbia helleri</i> easily distinguish it from other annual members of subg. Esula in North America. Collections of <i>E. helleri</i> have been made near Brownsville, Texas, and thus it is possible that the species occurs in northern Tamaulipas, Mexico. The Louisiana record (Webster Parish) likely represents introduced plants.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Euphorbia helleri
|authority=Millspaugh
|rank=species
|parent rank=subgenus
|synonyms=Tithymalus helleri
|basionyms=
|family=Euphorbiaceae
|phenology=Flowering and fruiting late winter–spring.
|habitat=Forests, stream banks, roadsides, shaded areas with sandy, calcareous soils.
|elevation=0–50 m.
|distribution=La.;Tex.;Mexico (Nuevo León).
|reference=None
|publication title=Bot. Gaz.
|publication year=1898
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V12/V12_899.xml
|genus=Euphorbia
|subgenus=Euphorbia subg. Esula
|species=Euphorbia helleri
}}<!--

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