View source for Sclerocactus glaucus

{{Treatment/ID
|accepted_name=Sclerocactus glaucus
|accepted_authority=(K. Schumann) L. D. Benson
|publications={{Treatment/Publication
|title=Cact. Succ. J. (Los Angeles)
|place=38: 53. 1966
|year=1966
}}
|common_names=Uinta Basin hookless cactus
|basionyms={{Treatment/ID/Synonym
|name=Echinocactus glaucus
|authority=K. Schumann
}}
|synonyms={{Treatment/ID/Synonym
|name=Ferocactus glaucus
|authority=(K. Schumann) N. P. Taylor
}} {{Treatment/ID/Synonym
|name=Pediocactus glaucus
|authority=(K. Schumann) Arp
}} {{Treatment/ID/Synonym
|name=Sclerocactus whipplei var. glaucus
|authority=(K. Schumann) S. L. Welsh
}}
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Sclerocactus;Sclerocactus glaucus
|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>[[Sclerocactus]]</div><div class="higher-taxon"><small>species</small>[[Sclerocactus glaucus]]</div></div>
|volume=Volume 4
|mention_page=page 200
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>usually unbranched, cylindric to elongate cylindric, 3–12(–28) × 4–9 cm; ribs (8–)12–13(–15), tubercles evident on ribs. <b>Spines</b> slightly or not at all obscuring stems; radial spines (2–)6–8(–12) per areole, white, 0–17 mm; central spines 1–3(–5) per areole, sometimes not greatly different from radial spines; abaxial central spines 0–2 per areole, brown, reddish brown to black, straight (rarely curved or hooked), 12–26 × 0.8–1 mm; lateral central spines 2–4 per areole, similar to abaxial; adaxial central spine 1 per areole, usually white (rarely light brown), elliptic in cross section, 15–31 × 0.5–1.8 mm. <b>Flowers</b> fragrant, funnelform (rarely campanulate), 3–5(–6) × (3–)4–5 cm; outer tepals with greenish lavender midstripes and pink margins, oblanceolate, 25–30 × 4–6 mm; inner tepals pink (rarely pale pink), oblanceolate to lanceolate, 24–30(–35) × 4–6 mm; filaments green to white; anthers yellow. <b>Fruits</b> not regularly dehiscent, ovoid, barrel-shaped, 9–22(–30) × 8–12 mm, dry, with a few membranous scales, mostly near the apex. <b>Seeds</b> black, 1.5 × 2.5 mm; testa with rounded papillae.</span><!--

-->{{Treatment/Body
|phenology=Flowering late Apr–May.
|habitat=Exposed, gravel-covered, clay hills, saltbush or sagebrush flats, or pinyon-juniper woodlands
|elevation=1400-2000 m
|distribution=Colo.
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Sclerocactus glaucus</i> is known only from Grand Junction area south to near Montrose, Colorado. The systematic and taxonomic confusion involving <i>S. glaucus</i> has been reviewed by K. D. Heil and J. M. Porter (1994); however, in their revision of <i>Sclerocactus</i>, <i>S. wetlandicus</i> was included within their circumscription of <i>S. glaucus</i>. Chloroplast DNA data (J. M. Porter et al. 2000) are consistent with F. Hochstätter’s (1997) assertion that these represent two taxa. Even so, <i>S. glaucus</i> and <i>S. wetlandicus</i> are morphologically very similar and in the herbarium may be very difficult to discriminate without resorting to scanning electron microscopy (SEM) or a determination based upon geography. The surface of the epidermal cells of <i>S. wetlandicus</i> and <i>S. brevispinus</i> is flattened; this can be observed easily at 20×, but only with some difficulty at 10×. The cells are convex with a flattened apex, like a hill that was strip mined, lacking the conoidal projection; whereas, those of <i>S. glaucus</i> are rounded.</p>
|tables=
|references=
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-->{{#Taxon:
name=Sclerocactus glaucus
|author=
|authority=(K. Schumann) L. D. Benson
|rank=species
|parent rank=genus
|synonyms=Ferocactus glaucus;Pediocactus glaucus;Sclerocactus whipplei var. glaucus
|basionyms=Echinocactus glaucus
|family=Cactaceae
|phenology=Flowering late Apr–May.
|habitat=Exposed, gravel-covered, clay hills, saltbush or sagebrush flats, or pinyon-juniper woodlands
|elevation=1400-2000 m
|distribution=Colo.
|reference=None
|publication title=Cact. Succ. J. (Los Angeles)
|publication year=1966
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V4/V4_374.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Sclerocactus
|species=Sclerocactus glaucus
}}<!--

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