View source for Echinocereus davisii

{{Treatment/ID
|accepted_name=Echinocereus davisii
|accepted_authority=Houghton
|publications={{Treatment/Publication
|title=Cact. Succ. J. (Los Angeles)
|place=2: 466, fig. 1931
|year=1931
}}
|common_names=Davis’s hedgehog cactus
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Echinocereus viridiflorus var. davisii
|authority=(Houghton) W. T. Marshall ex Backeberg
}}
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Echinocereus;Echinocereus davisii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cactaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Cactaceae subfam. Cactoideae]]</div><div class="higher-taxon"><small>genus</small>[[Echinocereus]]</div><div class="higher-taxon"><small>species</small>[[Echinocereus davisii]]</div></div>
|volume=Volume 4
|mention_page=page 170
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>tiny, usually unbranched in the wild, nearly covered by soil (often having only 2–5 areoles exposed). <b>Stems</b> erect, spheric, (1–)2–3 × 1–2(–2.5) cm; ribs 6–9, crests poorly defined, undulate; areoles of largest plants 6–7(–10) mm apart. <b>Spines</b> 8–14(–15) per areole, in relatively old plants curving irregularly in random directions, gray or white, some or all tipped black, dark reddish brown, or dull reddish purple; radial spines 8–14 per areole, ± pectinately arranged, (5–)10–15(–19) mm; central spines 0(–1) per areole, terete, 10–12 mm, closely resembling largest radial spines. <b>Flowers</b> 1.5–2 × 1.5–2(–2.7) cm; flower tube 5–8 × 5–10 mm; flower tube hairs very short, inconspicuous; inner tepals bright yellow-green, often with maroon midstripes, 9–18 × 2.7–3.8 mm, tips relatively thin and delicate; anthers yellow; nectar chamber 1 mm. <b>Fruits</b> purplish brown or remaining green when ripe, 5.5–9(–11) mm, pulp white. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering Feb–Mar; fruiting 1 1/2-2 months after flowering.
|habitat=Semidesert grasslands, novaculite outcrops
|elevation=1200-1300 m
|distribution=Tex.
|discussion=<p>The relatively heavy, brown-and-white, often slightly contorted radial spines of <i>Echinocereus davisii</i> help to distinguish these tiny plants from seedlings of their larger congeners; remains of flowers and fruits, such as scattered flower tube spine-clusters, provide proof of sexual maturity. <i>Echinocereus davisii</i> is easily distinguished from <i>E. viridiflorus</i>; it is parapatric with <i>E. viridiflorus</i> without evidence of introgression. <i>Echinocereus davisii</i> is less compatible with <i>E. viridiflorus</i> than any varieties of <i>E. viridiflorus</i> are with one another (E. E. Leuck 1980).</p><!--
--><p><i>Echinocereus davisii</i> is in the Center for Plant Conservation’s National Collection of Endangered Plants.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Echinocereus davisii
|author=
|authority=Houghton
|rank=species
|parent rank=genus
|synonyms=Echinocereus viridiflorus var. davisii
|basionyms=
|family=Cactaceae
|phenology=Flowering Feb–Mar; fruiting 1 1/2-2 months after flowering.
|habitat=Semidesert grasslands, novaculite outcrops
|elevation=1200-1300 m
|distribution=Tex.
|reference=None
|publication title=Cact. Succ. J. (Los Angeles)
|publication year=1931
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V4/V4_325.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Echinocereus
|species=Echinocereus davisii
}}<!--

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