View source for Coryphantha robertii

{{Treatment/ID
|accepted_name=Coryphantha robertii
|accepted_authority=A. Berger
|publications={{Treatment/Publication
|title=Kakteen,
|place=280. 1929
|year=1929
}}
|basionyms={{Treatment/ID/Basionym
|name=Escobaria runyonii
|authority=Britton & Rose
|publication_title=Cact.
|publication_place=4: 55, fig. 53, plate 6, fig. 1. 1923,
}}
|synonyms={{Treatment/ID/Synonym
|name=Coryphantha emskoetteriana
|authority=(Quehl) A. Berger
}} {{Treatment/ID/Synonym
|name=Coryphantha muehlbaueriana
|authority=Boedeker
}}
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Coryphantha;Coryphantha robertii
|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 robertii]]</div></div>
|volume=Volume 4
|mention_page=page 222, 224
|treatment_page=page 229
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>many branched, resulting in irregular masses of mostly immature stems that proliferate before reaching sexual maturity, clumps 10–30(–100) cm diam., whitish bristly, spines nearly obscuring stem surface. <b>Roots</b> diffuse. <b>Stems</b> ovoid to cylindric, 3–6 × 1.5–3 cm; tubercles 4–8 × 3–5 mm, moderately soft; areolar glands absent; parenchyma not mucilaginous; druses in pith and cortex abundant but nearly microscopic; pith ca. 1/2 of lesser stem diam.; medullary vascular system absent. <b>Spines</b> (21–)27–51(–60?) per areole, snowy white or gray, except inner central spines pale yellow or tan proximally, reddish brown to nearly black in distal 1/2 or more; radial spines (18–)24–41 per areole, (4–)6–9(–10) × 0.03–0.2 mm, adaxial 1–4 radial spines of fresh areoles on the largest stems greatly elongated, hairlike, ± contorted, semideciduous; subcentral spines 0–12 per areole; outer central spines (1–)3–9(–17) per areole, straight; inner central spines 0(–1) per areole, ascending, descending, or porrect, other spines appressed or (usually) slightly projecting, some often descend from abaxial 1/2 of areole, (4–)5–13(–17.5) × 0.17–0.27 mm. <b>Flowers</b> nearly apical, 15–30 × 10–19 mm, sterile distal part of flower tube 0–2 mm, shorter than stamen-bearing part; outer tepals conspicuously fringed; inner tepals 14 per flower, sometimes shiny greenish yellow, usually with ± sharply defined midstripes of pinkish, brown, or brownish green, sometimes purplish pink distally, margins and proximal portion white or cream, 8–12 × 1.5–3 mm; outer filaments white; anthers bright yellow; stigma lobes 4(–7), dark green to bright yellow (rarely red), 1.5–2 mm. <b>Fruits</b> bright red throughout [sometimes green], ellipsoid, cylindric, or narrowly obovoid, 11–20 × 3–5 mm, not very succulent; floral remnant strongly persistent. <b>Seeds</b> black, even when fresh, ± spheric, pitted. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Flowering Feb–Mar; fruiting 2-3 months after flowering.
|habitat=Dense scrub, often with Leucophyllum, Agave lechuguilla, Echinocereus poselgeri, or Lophophora, limestone, gravel, or silt substrates
|elevation=50-400 m
|distribution=Tex.;Mexico (Coahuila;Nuevo León;Tamaulipas).
|discussion=<p>An earlier name, <i>Echinocactus</i> pottsiana Poselger, may apply to the species here called <i>Coryphantha robertii</i>. The type specimen is fragmentary with squashed, disintegrated spine clusters, one seed, and vague locality data.</p><!--
--><p><i>Coryphantha robertii</i> is like <i>C. sneedii</i> in almost all respects, including nearly all variations of growth habit, phyllotaxy, spine color, spine arrangement/dimensions, floral morphology, fruit color dimorphism, and in most variations of tepal color.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Coryphantha robertii
|author=
|authority=A. Berger
|rank=species
|parent rank=genus
|synonyms=Coryphantha emskoetteriana;Coryphantha muehlbaueriana
|basionyms=Escobaria runyonii
|family=Cactaceae
|phenology=Flowering Feb–Mar; fruiting 2-3 months after flowering.
|habitat=Dense scrub, often with Leucophyllum, Agave lechuguilla, Echinocereus poselgeri, or Lophophora, limestone, gravel, or silt substrates
|elevation=50-400 m
|distribution=Tex.;Mexico (Coahuila;Nuevo León;Tamaulipas).
|reference=None
|publication title=Kakteen,
|publication year=1929
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V4/V4_420.xml
|subfamily=Cactaceae subfam. Cactoideae
|genus=Coryphantha
|species=Coryphantha robertii
}}<!--

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