View source for Jatropha canescens

{{Treatment/ID
|accepted_name=Jatropha canescens
|accepted_authority=(Bentham) Müller Arg. in A. P. de Candolle and A. L. P. P. de Candolle
|publications={{Treatment/Publication
|title=Prodr.
|place=15(2): 1079. 1866
|year=1866
}}
|common_names=Sangre de drago;Arizona nettlespurge
|basionyms={{Treatment/ID/Basionym
|name=Mozinna canescens
|authority=Bentham
|rank=species
|publication_title=Bot. Voy. Sulphur,
|publication_place=52, plate 25. 1844
}}
|synonyms=
|hierarchy=Euphorbiaceae;Jatropha;Jatropha canescens
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Euphorbiaceae]]</div><div class="higher-taxon"><small>genus</small>[[Jatropha]]</div><div class="higher-taxon"><small>species</small>[[Jatropha canescens]]</div></div>
|volume=Volume 12
|mention_page=page 199, 203
|treatment_page=page 202
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> to 1.2–2.5 m, dioecious. <b>Stems</b> erect, grayish white, branched from base, woody-succulent, canescent; short shoots common; latex watery, cloudy-whitish. <b>Leaves</b> deciduous, mostly ± evenly distributed on long shoots, few on short shoots; stipules absent; petiole 1.3–3 cm, not stipitate-glandular; blade cordate to broadly ovate, 2.2–3.5 × 1.6–3 cm, unlobed or shallowly 3-lobed, base truncate-cordate, margins entire, apex rounded, ± coriaceous, abaxial surface canescent, adaxial surface sparingly hairy; venation pinnate (palmate if lobed). <b>Inflorescences</b> terminal on branches or on short shoots, staminate cymes, pistillate fascicles, or flowers solitary; peduncle 1–2.6 cm; bracts 1–2.5 mm, margins entire, sparsely hairy. <b>Pedicels</b> 2–3 mm. <b>Staminate</b> flowers: sepals connate to 1/4 length, lanceolate, 2–2.5 × 0.5–0.8 mm, margins entire, apex acute, canescent abaxially, glabrous or sparingly hairy adaxially; corolla grayish white, sometimes pinkish abaxially, subglobose-urceolate, petals connate 3/4–4/5 length, 5–8 × 1–2 mm, surfaces sparingly hairy; stamens 10 in 2 whorls (5 + 5); filaments of outer whorl connate 1/2 length, of inner whorl connate 1/4 length, outer whorl 2–3 mm, whorl series 4–5 mm. <b>Pistillate</b> flowers resembling staminate, but sepals connate only at base, 3–3.5 × 1.5–2 mm; petals connate 1/2–3/4 length, 8–11 × 3–5 mm; carpels 2[–3]; styles connate 3/4 their lengths, 2–5 mm. <b>Capsules</b> compressed ellipsoidal, 1.2–1.5 × 2–2.5 cm, 2-lobed [ellipsoidal, 3-lobed], tardily dehiscent. <b>Seeds</b> solid brown, subspheric, 9–12 mm; caruncle absent. <b>2n</b> = 22 (Mexico).</span><!--

-->{{Treatment/Body
|phenology=Flowering and fruiting late spring(–summer).
|habitat=Sandy washes, sand dunes.
|elevation=0–500 m.
|distribution=Ariz.;Mexico (Baja California;Baja California Sur;Sinaloa;Sonora).
|discussion=<p>In Arizona, <i>Jatropha canescens</i> is found only in Pima County, primarily in Organ Pipe Cactus National Monument.</p><!--
--><p><i>Jatropha canescens</i> is part of a hybrid complex that includes the Mexican species <i>J. cinerea</i> (Ortega) Müller Arg. and, probably, J. giffordiana Dehgan & G. L. Webster. These can be difficult to distinguish. R. McVaugh (1945) suggested considering <i>J. canescens</i> as a synonym of <i>J. cinerea</i>, and F. Shreve and I. L. Wiggins (1964), as well as others, have done so. <i>Jatropha canescens</i> may be distinguished from <i>J. cinerea</i> and J. giffordiana most reliably by its crowded inflorescences of staminate flowers with smaller subglobose (as opposed to urceolate) whitish gray corollas (sometimes with some red or pink on the adaxial surface) as opposed to larger darker red corollas of <i>J. cinerea</i> and J. giffordiana. In addition, <i>J. canescens</i> generally has more numerous, longer and darker colored short shoots, and smaller and less often shallowly 3-lobed leaves. Although <i>J. cinerea</i> (in the strict sense) does not occur in northern Sonora, it is one of the more common plants in Baja California, Baja California Sur, and western mainland Mexico.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Jatropha canescens
|authority=(Bentham) Müller Arg. in A. P. de Candolle and A. L. P. P. de Candolle
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Mozinna canescens
|family=Euphorbiaceae
|phenology=Flowering and fruiting late spring(–summer).
|habitat=Sandy washes, sand dunes.
|elevation=0–500 m.
|distribution=Ariz.;Mexico (Baja California;Baja California Sur;Sinaloa;Sonora).
|reference=None
|publication title=Prodr.
|publication year=1866
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V12/V12_63.xml
|genus=Jatropha
|species=Jatropha canescens
}}<!--

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