View source for Echinocereus arizonicus

{{Treatment/ID
|accepted_name=Echinocereus arizonicus
|accepted_authority=Rose ex Orcutt
|publications={{Treatment/Publication
|title=Cactography
|place=1926(1): 3. 1926
|year=1926
}}
|common_names=Arizona claret-cup cactus;Arizona hedgehog cactus
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Echinocereus coccineus var. arizonicus
|authority=(Rose ex Orcutt) D. J. Ferguson
|rank=variety
}} {{Treatment/ID/Synonym
|name=Echinocereus triglochidiatus var. arizon
|authority=icus (Rose ex Orcutt) L. D. Benson
|rank=variety
}}
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Echinocereus;Echinocereus arizonicus
|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 arizonicus]]</div></div>
|volume=Volume 4
|mention_page=page 168
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>few to many branched. <b>Stems</b> usually erect, cylindric, 10–40 × 5–10 cm; ribs 8–13, slightly undulate; areoles 10–15 mm apart. <b>Spines</b> [8–]9–18 per areole, straight or contorted; radial spines 7–14 per areole, appressed, yellowish to brownish, becoming gray, 5–25 mm; central spines 1–4 (c Arizona and Mexico) or 3–8 (elsewhere) per areole, spreading to projecting outward, brownish yellow to reddish black, becoming gray, terete (c Arizona) or angled to terete (elsewhere), 15–50 mm. <b>Flowers</b> 5.5–7 × 3.5–5 cm; flower tube 25–35 mm; flower tube spines 5–15 mm, hairs to 2 mm; inner tepals bright orange-red to dark red distally, proximally paler (bases sometimes yellow or whitish), 25–40 × (5–)10–15 mm, tips thick and rigid; anthers pink to brick red or purple; nectar chamber 6–10 mm. <b>Fruits</b> green, brownish tinged, 20–30 mm, pulp white. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–May; fruiting May–Jul.
|habitat=Chihuahuan Desert, desert scrub, interior chaparral, desert grasslands, steep walls of canyons, limestone hills, among granite boulders
|elevation=1400-1900 m
|distribution=Ariz.;N.Mex.;Mexico (Chihuahua).
|discussion=<p>Some populations of diploid claret-cup cacti in southeastern Arizona and southwestern New Mexico have recently been named <i>Echinocereus arizonicus</i> subsp. nigrihorridispinus W. Blum & Rutow, including numerous eastern populations previously misidentified as other taxa. Subspecies arizonicus, of conservation concern, remains known only from central Arizona. Infraspecific taxa within <i>E. arizonicus</i> are not treated formally here because their taxonomic boundaries remain controversial.</p><!--
--><p><i>Echinocereus arizonicus</i> superficially resembles the dioecious tetraploid <i>E. coccineus</i> var. rosei of the Chihuahuan Desert, and several of its populations were mapped by L. D. Benson (1969, 1982) as part of E. triglochidatus <i></i>var.<i> neomexicanus</i> (Standley) Standley ex W. T. Marshall. <i>Echinocereus arizonicus</i> subsp. nigrihorridispinus superficially resembles the partially sympatric, synoecious tetraploid recently named E. santaritensis W. Blum & Rutow (a hermaphroditic geographic race of <i>E. coccineus</i>), which has much longer hairs on the flowers, a narrower flower tube, and relatively slender spines. Irrespective of the misleading vegetative similarities between diploid <i>E. arizonicus</i> and its polyploid relatives, <i>E. arizonicus</i> differs strongly from both varieties of the diploid <i>E. triglochidiatus</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Echinocereus arizonicus
|authority=Rose ex Orcutt
|rank=species
|parent rank=genus
|synonyms=Echinocereus coccineus var. arizonicus;Echinocereus triglochidiatus var. arizon
|basionyms=
|family=Cactaceae
|phenology=Flowering Apr–May; fruiting May–Jul.
|habitat=Chihuahuan Desert, desert scrub, interior chaparral, desert grasslands, steep walls of canyons, limestone hills, among granite boulders
|elevation=1400-1900 m
|distribution=Ariz.;N.Mex.;Mexico (Chihuahua).
|reference=None
|publication title=Cactography
|publication year=1926
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V4/V4_322.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Echinocereus
|species=Echinocereus arizonicus
}}<!--

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