View source for Coryphantha dasyacantha

{{Treatment/ID
|accepted_name=Coryphantha dasyacantha
|accepted_authority=(Engelmann) Orcutt
|publications={{Treatment/Publication
|title=Cactography
|place=1926(1): 5. 1926
|year=1926
}}
|common_names=Big Bend cactus
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Mammillaria dasyacantha
|authority=Engelmann
|rank=species
|publication_title=Proc. Amer. Acad. Arts
|publication_place=3: 268. 1856 (as Mamilliaria)
}}
|synonyms={{Treatment/ID/Synonym
|name=Escobaria dasyacantha
|authority=(Engelmann)B ritton & Rose
|rank=species
}} {{Treatment/ID/Synonym
|name=Escobesseya dasyacantha
|authority=(Engelmann) Hester
|rank=species
}}
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Coryphantha;Coryphantha dasyacantha
|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>[[Coryphantha]]</div><div class="higher-taxon"><small>species</small>[[Coryphantha dasyacantha]]</div></div>
|volume=Volume 4
|mention_page=page 224, 229
|treatment_page=page 230
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>usually unbranched (rarely 2–5 branches), white or brown bristly stem. <b>Roots</b> diffuse (rarely short taproots). <b>Stems</b> spheric, becoming short cylindric in age, 4.5–10(–17) × (2–)3–4.5(–6) cm (1–3 × 2–5 cm in Davis Mountains, Texas); tubercles (4–)7–8(–12) × 3–5(–7) mm, moderately soft; areolar glands absent; parenchyma not mucilaginous, medullary vascular system absent. <b>Spines</b> 26–42 per areole, white with red-brown to nearly black tips (brown to reddish brown with black tips in Davis Mountains); radial spines 21–31 per areole (12–22 in Davis Mountains), 6–9(–10) mm; subcentral spines several, appressed; central spines (3–)4–9(–11) per areole (2 in Davis Mountains), spreading, straight, longest spines 12–17 × 0.2–0.3(–0.4) mm. <b>Flowers</b> nearly apical, 15–30 × (10–)13–15(–22) mm, sterile distal part of flower tube 0–2 mm, shorter than stamen-bearing part; outer tepals conspicuously fringed; inner tepals 14 per flower, midstripes pinkish to brown or brownish green, proximally white, (7–)8–10(–12) × 1.5–3 mm; outer filaments white or colorless; anthers bright yellow; stigma lobes 4(–6), dark green to bright yellow, 1–2.5 mm. <b>Fruits</b> bright red, clavate, cylindric, or narrowly ellipsoid, (7–)13–27(–35) × 3.5–6(–7) mm, not very succulent; floral remnant strongly persistent. <b>Seeds</b> black, subspheric, 1–1.2 mm, pitted. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Jul; fruiting (May-)Jun–Aug, ca (1 1/2)-(2 1/2) months after flowering.
|habitat=Desert scrub with Larrea or Prosopis, on limestone, igneous rocks, gravelly bajadas, silty flats
|elevation=800-1900 m
|distribution=Tex.
|discussion=<p>Many published photographs and specimen citations purported to represent <i>Coryphantha dasyacantha</i> reflect misidentifications. Ripe fruits, with their strongly persistent floral remnant, provide the only simple way to distinguish <i>C. dasyacantha</i> from <i>C. duncanii</i>. The black fresh seeds of <i>C. dasyacantha</i> and related species usually provide immediate distinction from <i>C. tuberculosa</i>, <i>C. sneedii</i>, and <i>C. vivipara</i>, which have differently shaped, bright reddish brown fresh seeds. In addition, the greenish stigma lobes of <i>C. dasyacantha</i>, <i>C. duncanii</i>, <i>C. chaffeyi</i>, C. pottsiana, and certain Mexican taxa contrast with the violet or white stigma lobes of <i>C. vivipara</i>, <i>C. sneedii</i>, <i>C. alversonii</i>, and <i>C. hesteri</i>. Vegetatively, <i>C. dasyacantha</i> always is distinguishable from <i>C. vivipara</i> and <i>C. sneedii</i> by its lack of the unusually large druses described under 20. <i>C. sneedii</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Coryphantha dasyacantha
|authority=(Engelmann) Orcutt
|rank=species
|parent rank=genus
|synonyms=Escobaria dasyacantha;Escobesseya dasyacantha
|basionyms=Mammillaria dasyacantha
|family=Cactaceae
|phenology=Flowering Mar–Jul; fruiting (May-)Jun–Aug, ca (1 1/2)-(2 1/2) months after flowering.
|habitat=Desert scrub with Larrea or Prosopis, on limestone, igneous rocks, gravelly bajadas, silty flats
|elevation=800-1900 m
|distribution=Tex.
|reference=None
|publication title=Cactography
|publication year=1926
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V4/V4_422.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Coryphantha
|species=Coryphantha dasyacantha
}}<!--

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