Difference between revisions of "Coryphantha robbinsorum"
Cac t. Succ. J. (Los Angeles) 50: 294. 1978.
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|distribution=Ariz.;Mexico (Sonora). | |distribution=Ariz.;Mexico (Sonora). | ||
|discussion=<p>Of conservation concern.</p><!-- | |discussion=<p>Of conservation concern.</p><!-- | ||
| − | --><p>Coryphantha robbinsorum is somewhat intermediate between the C. dasyacantha species-group, especially C. zilziana Boedeker, and the C. missouriensis species-group.</p><!-- | + | --><p><i>Coryphantha robbinsorum</i> is somewhat intermediate between the <i>C. dasyacantha</i> species-group, especially C. zilziana Boedeker, and the <i>C. missouriensis</i> species-group.</p><!-- |
| − | --><p>Coryphantha robbinsorum is in the Center for Plant Conservation’s National Collection of Endangered Plants.</p> | + | --><p><i>Coryphantha robbinsorum</i> is in the Center for Plant Conservation’s National Collection of Endangered Plants.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1978 | |publication year=1978 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V4/V4_424.xml |
|subfamily=Cactaceae subfam. Cactoideae | |subfamily=Cactaceae subfam. Cactoideae | ||
|genus=Coryphantha | |genus=Coryphantha | ||
Revision as of 18:28, 18 September 2019
Plants usually unbranched, spine-bearing areoles with long white wool obscuring basal portion of spine. Roots diffuse or short taproots. Stems deep-seated (buried except for its apical 0.5–3 cm), 2–10 × 2–6 cm; tubercles 5–8 × 4–6 mm, moderately soft; areolar glands absent. Spines 11–20 per areole, white, largest spines dark tipped when fresh, straight; radial spines 10–20 per areole, 8–18 × 0.2–0.5 mm; central spines 0(–1) per areole, similar to largest radial spines, but porrect, ca. 8–18 mm. Flowers nearly apical, 12–29 × 10–18.5 mm; outer tepals fringed; inner tepals 14 per flower, dull yellow, frequently tinted greenish or bronze, often with midstripes of brownish or dull pink; outer filaments greenish; anthers bright yellow; stigma lobes green or yellow-green. Fruits bright orange-red or scarlet, spheric to obovoid, 6–8.5 × 3–4.5 mm, slightly juicy, quickly drying and turning brownish; floral remnant weakly persistent, often deciduous through breakage not abscission. Seeds dark brown, drying blackish, spheric, 1.3–1.4 mm, pitted. 2n = 22.
Phenology: Flowering Mar–Apr; fruiting Jun–Aug.
Habitat: Semidesert grasslands, limestone hills
Elevation: 1300-1500 m
Distribution
Ariz., Mexico (Sonora).
Discussion
Of conservation concern.
Coryphantha robbinsorum is somewhat intermediate between the C. dasyacantha species-group, especially C. zilziana Boedeker, and the C. missouriensis species-group.
Coryphantha robbinsorum is in the Center for Plant Conservation’s National Collection of Endangered Plants.
Selected References
None.