Difference between revisions of "Thelocactus bicolor var. bicolor"
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|accepted_name=Thelocactus bicolor var. bicolor | |accepted_name=Thelocactus bicolor var. bicolor | ||
| − | |accepted_authority= | + | |accepted_authority= |
|publications= | |publications= | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
| + | |label=Illustrated | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Thelocactus bicolor var. schottii | |name=Thelocactus bicolor var. schottii | ||
|authority=(K. Schumann) F. M. Knuth | |authority=(K. Schumann) F. M. Knuth | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Thelocactus bicolor var. tricolor | |name=Thelocactus bicolor var. tricolor | ||
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| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Thelocactus;Thelocactus bicolor;Thelocactus bicolor var. bicolor | |hierarchy=Cactaceae;Cactaceae subfam. Cactoideae;Thelocactus;Thelocactus bicolor;Thelocactus bicolor var. bicolor | ||
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name=Thelocactus bicolor var. bicolor | name=Thelocactus bicolor var. bicolor | ||
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|rank=variety | |rank=variety | ||
|parent rank=species | |parent rank=species | ||
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|publication title= | |publication title= | ||
|publication year= | |publication year= | ||
| − | |special status= | + | |special status=Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V4/V4_407.xml |
|subfamily=Cactaceae subfam. Cactoideae | |subfamily=Cactaceae subfam. Cactoideae | ||
|genus=Thelocactus | |genus=Thelocactus | ||
Latest revision as of 22:58, 5 November 2020
Plants few branched or unbranched, usually not deep-seated in substrate. Stems usually ovoid to cylindric at maturity, 7.5–18(–38) × 5–10(–13) cm, surface very poorly concealed to 1/2 hidden by spines; ribs 8–13, tubercles confluent into rounded ribs 15–25 mm wide; areoles spaced 8–20 mm apart along ribs. Spines red and white (older spines weather to ashy white); radial spines 9–18 per areole, longest spines 12–30 mm; adaxial (bladelike) spines 16–75(–100) × 1.5 mm; central spines (1–)4, longest spines terete to sharply angular, then abaxially keeled and adaxially flat to grooved, (13–)20–45(–60) × 0.4–1.5 mm, adaxial 3 like radials but larger. 2n = 22.
Phenology: Flowering (Feb–May)Jul–Sep.
Habitat: Chihuahuan desert scrub, Tamaulipan thorn scrub, sedimentary, igneous, and alluvial substrates
Elevation: 0-1200[-2000] m
Distribution
Tex., Mexico (Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Tamaulipas, Zacatecas).
Discussion
Thelocactus bicolor var. bicolor, in the strict sense, may be limited to Mexico; if so, then var. tricolor and/or var. schottii might deserve formal recognition.
Selected References
None.