View source for Cylindropuntia ×tetracantha

{{Treatment/ID
|accepted_name=Cylindropuntia ×tetracantha
|accepted_authority=(Toumey) F. M. Knuth in C. Backeberg and F. M. Knuth
|publications={{Treatment/Publication
|title=in C. Backeberg and F. M. Knuth, Kaktu s-ABC,
|place=124. 1935
|year=1935
}}
|basionyms={{Treatment/ID/Basionym
|name=Opuntia tetracantha
|authority=Toumey
|publication_title=Gard. &amp; Forest
|publication_place=9: 432. 1896
}}
|synonyms={{Treatment/ID/Synonym
|name=Opuntia kleiniae var. tetracantha
|authority=(Toumey) W. T. Marshall
}}
|hierarchy=Cactaceae;Cactaceae subfam. Opuntioideae;Cylindropuntia;Cylindropuntia ×tetracantha
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cactaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Cactaceae subfam. Opuntioideae]]</div><div class="higher-taxon"><small>genus</small>[[Cylindropuntia]]</div><div class="higher-taxon"><small>species</small>[[Cylindropuntia ×tetracantha]]</div></div>
|volume=Volume 4
|mention_page=page 103, 104
|treatment_page=page 106
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Shrubs,</b> openly branched, 0.5–1.3 m. <b>Stem</b> segments usually alternate, green to gray-green (or reddish), 5–28 × 0.7–1.4 cm; tubercles moderately prominent, narrowly elongate, 1.5–3 cm; areoles subcircular, 1.5–3 mm in diam.; wool tan, aging gray. <b>Spines</b> (0–)1–4 per areole, in all but proximal areoles of stem segment, usually all deflexed, yellow with whitish to pinkish basal coating, moderately stout to acicular, the longest 1.5–2.8 cm; sheaths whitish at bases to golden at tips. <b>Glochids</b> in adaxial tuft and marginal about areole, yellow, 1–3 mm. <b>Flowers</b>: inner tepals greenish bronze or red to magenta, spatulate- to obovate-apiculate, 10–15 mm; filaments reddish; anthers light yellow; color of style and stigma lobes unknown. <b>Fruits</b> commonly sterile, often proliferating, green, becoming yellow with red blush to red, obconic to obovate-stipitate, 15–23 × 10–20 mm, fleshy, moderately tuberculate; umbilicus deep, 3–4.5 mm; areoles 10–18, a few producing 1(–2) short spines. <b>Seeds</b> tan, angularly subcircular to broadly oval, warped, 3–4 × 3–3.5 mm; girdle broad, lumpy, little protruding. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering spring (Apr–May).
|habitat=Sonoran desert scrub, flats, hills
|elevation=500-1000 m
|distribution=Ariz.
|discussion=<p><i>Cylindropuntia ×tetracantha</i> (= <i>C. acanthocarpa</i> × <i>C. leptocaulis</i>) is an uncommon hybrid; sympatric hybrids long confused with and usually included in <i>C. ×tetracantha</i> involve <i>C. leptocaulis</i> × <i>C. spinosior</i>, which have spineless, reddish, and strongly tuberculate fruits and long-spreading, subwhorled branches, and <i>C. leptocaulis</i> × <i>C. versicolor</i>, which have spineless, reddish, smooth, and enlarged fruits and a less spreading habit.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Cylindropuntia ×tetracantha
|author=
|authority=(Toumey) F. M. Knuth in C. Backeberg and F. M. Knuth
|rank=species
|parent rank=genus
|synonyms=Opuntia kleiniae var. tetracantha
|basionyms=Opuntia tetracantha
|family=Cactaceae
|phenology=Flowering spring (Apr–May).
|habitat=Sonoran desert scrub, flats, hills
|elevation=500-1000 m
|distribution=Ariz.
|reference=None
|publication title=in C. Backeberg and F. M. Knuth, Kaktu s-ABC,
|publication year=1935
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V4/V4_198.xml
|subfamily=Cactaceae subfam. Opuntioideae
|genus=Cylindropuntia
|species=Cylindropuntia ×tetracantha
}}<!--

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