View source for Echinocereus dasyacanthus

{{Treatment/ID
|accepted_name=Echinocereus dasyacanthus
|accepted_authority=Engelmann in F. A. Wislizenus
|publications={{Treatment/Publication
|title=in F. A. Wislizenus, Mem. Tour N. Mexico,
|place=100. 1848
|year=1848
}}
|common_names=Texas rainbow cactus;spiny hedgehog cactus
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Echinocereus pectinatus var. dasyacanthus
|authority=(Engelmann) W. Earle ex N. P. Taylor
|rank=variety
}}
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Echinocereus;Echinocereus dasyacanthus
|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 dasyacanthus]]</div></div>
|volume=Volume 4
|mention_page=page 163
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>unbranched or few branched, forming loose clumps of fewer than 20 stiff branches in old age. <b>Stems</b> erect, ovoid, becoming cylindric with age, 11–23(–40) × (4.5–)5.5–7(–10) cm; ribs (13–)15–19(–21), crests rather sharply undulate; areoles 5–11 mm apart. <b>Spines</b> 19–28 per areole, straight, appressed (radial spines) or spreading in all directions (central spines), presenting relatively bristly appearance (except when spines very short, and then having relatively smooth appearance as in <i>E. pectinatus</i>), pink to pale yellow, white, or tan, less often dark brown or purplish, annual growth increments marked (often vaguely) by rings of spines with contrasting colors; radial spines (16–)17–25(–28) per areole, 5–15(–25) mm; central spines (2–)8–12(–15) per areole, terete, largest spines 4.5–9.5(–14) mm. <b>Flowers</b> 7–8.5(–10) × 7–12 cm; flower tube 10–20 × to 10 mm; flower tube hairs 1–3 mm; inner tepals either yellow (rarely orange-yellow, sometimes becoming salmon- or rose-pink with age), or rose-pink to magenta, proximal 5–30% green in either case, (25–)32–69(–77) × 8–23 mm, tips relatively thin and delicate; anthers yellow; nectar chamber 2–6 mm. <b>Fruits</b> dark dull purplish to maroon (sometimes remaining green), 2–3.5 cm, pulp white to purplish pink. <b>2n</b> = 44.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–May; fruiting Jun–Aug.
|habitat=Chihuahuan desert scrub, valleys to rocky canyonsides, limestone
|elevation=600-1500 m
|distribution=N.Mex.;Tex.;Mexico (Chihuahua;Coahuila).
|discussion=<p>Flower color of <i>Echinocereus dasyacanthus</i> is spectacularly polymorphic. Unlike <i>E. pectinatus </i>var.<i> wenigeri</i>, however, the inner tepals are never white proximally. No hybrids are known to occur where the tetraploid <i>E. dasyacanthus</i> grows sympatrically with the diploid <i>E. pectinatus</i>, near the Pecos River. The names <i>E. pectinatus</i> <i></i>var.<i> neomexicanus</i> and <i></i>var.<i> minor</i> pertain to the hybrids with <i>E. coccineus</i>, E. ×roetteri, including E. ×lloydia. L. D. Benson (1969) misapplied the epithet neomexicanus to <i>E. dasyacanthus</i>. In Big Bend National Park, a few populations with unusually short spines are the basis for erroneous reports of <i>E. pectinatus </i>var.<i> wenigeri</i>, <i>E. pectinatus</i> var. pectinatus, and E. ctenoides (Engelmann) Lemaire. Reports from Arizona were apparently misidentifications of <i>E. pseudopectinatus</i>.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Echinocereus dasyacanthus
|authority=Engelmann in F. A. Wislizenus
|rank=species
|parent rank=genus
|synonyms=Echinocereus pectinatus var. dasyacanthus
|basionyms=
|family=Cactaceae
|phenology=Flowering Mar–May; fruiting Jun–Aug.
|habitat=Chihuahuan desert scrub, valleys to rocky canyonsides, limestone
|elevation=600-1500 m
|distribution=N.Mex.;Tex.;Mexico (Chihuahua;Coahuila).
|reference=None
|publication title=in F. A. Wislizenus, Mem. Tour N. Mexico,
|publication year=1848
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V4/V4_314.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Echinocereus
|species=Echinocereus dasyacanthus
}}<!--

-->[[Category:Treatment]][[Category:Echinocereus]]