View source for Hamatocactus bicolor

{{Treatment/ID
|accepted_name=Hamatocactus bicolor
|accepted_authority=(Terán & Berlandier) I. M. Johnston
|publications={{Treatment/Publication
|title=Contr. Gray Herb.
|place=70: 88. 1924
|year=1924
}}
|common_names=Twisted-rib cactus
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Cactus bicolor
|authority=Terán & Berlandier
|rank=species
|publication_title=in J. L. Berlandier, Mem. Comis. Limites,
|publication_place=4. 1832
}}
|synonyms={{Treatment/ID/Synonym
|name=Ferocactus setispinus
|authority=(Engelma nn) L. D. Benson
|rank=species
}} {{Treatment/ID/Synonym
|name=Hamatocactus setispinus
|authority=(Englemann) Britton & Rose
|rank=species
}} {{Treatment/ID/Synonym
|name=Thelocactus setispinus
|authority=(Engelmann) E. F. Anderson
|rank=species
}}
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Hamatocactus;Hamatocactus bicolor
|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>[[Hamatocactus]]</div><div class="higher-taxon"><small>species</small>[[Hamatocactus bicolor]]</div></div>
|volume=Volume 4
|mention_page=page 208, 209
|treatment_page=page 219
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Spines:</b> central spine yellowish, becoming ashy gray or reddish brown, 1–3.8 cm, minutely scabrous (use 30× lens). <b>Flowers</b> yellow with red centers, leaving obvious, concave abscission scars after fall of flower or fruit; proximal outer tepals obtuse or with broad ± auriculate distal portions; distal ones minutely fringed, acute; inner tepals oblanceolate; filaments reddish, pale yellow, or whitish, collectively spiraled around style; ovary 8–13 mm diam. <b>Fruits</b> displaced away from stem apex by apical growth subsequent to flowering. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering spring–early fall.
|habitat=Grasslands, shrublands, especially mesquite thickets, heavy soils
|elevation=0-300 m
|distribution=Tex.;Mexico (Coahuila;Nuevo León;Tamaulipas).
|discussion=<p><i>Hamatocactus bicolor</i> is taxonomically isolated in the flora. It is perhaps most similar to <i>Thelocactus bicolor</i>, but <i>H. bicolor</i> is dramatically different in its juicy, scarlet fruits, yellow flowers, very narrowly and sharply ribbed stem surface, and hooked central spines. <i>Hamatocactus bicolor</i> is superficially similar to <i>Ferocactus hamatacanthus </i>var.<i> sinuatus</i>, which is larger and green-fruited with pitted seed coat and much larger yellow flowers lacking red centers. <i>Glandulicactus uncinatus</i> has hooked radial spines, rounded birbs, and small, maroon flowers.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Hamatocactus bicolor
|authority=(Terán & Berlandier) I. M. Johnston
|rank=species
|parent rank=genus
|synonyms=Ferocactus setispinus;Hamatocactus setispinus;Thelocactus setispinus
|basionyms=Cactus bicolor
|family=Cactaceae
|phenology=Flowering spring–early fall.
|habitat=Grasslands, shrublands, especially mesquite thickets, heavy soils
|elevation=0-300 m
|distribution=Tex.;Mexico (Coahuila;Nuevo León;Tamaulipas).
|reference=None
|publication title=Contr. Gray Herb.
|publication year=1924
|special status=Illustrated
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V4/V4_410.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Hamatocactus
|species=Hamatocactus bicolor
}}<!--

-->[[Category:Treatment]][[Category:Hamatocactus]]