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Abstract
Individuals of
E. sneedii var.
sneedii were found to occur in greater abundance within the Guadalupe Mountains than was previously recorded. No additional populations morphologically intermediate between
E. guadalupensis and
E. sneedii were found. Taxonomic affiliation and geographic distribution among three
Escobaria taxa were readdressed with phenetic analyses. Principle components analysis (PCA) showed moderate resolution between individuals representing
E. guadalupensis and
E. sneedii. Resolution was poor between those of
E. sneedii var.
sneedii and
E. sneedii var.
leei. Results from discriminant analysis (DA) correctly classified individuals within populations of
E. guadalupensis,
E. sneedii var.
sneedii and
E. sneedii var.
leei 100, 79.6, and 86.4 percent, respectively. The taxonomic recognition of
E. sneedii var.
leei, as separate from
E. sneedii var.
sneedii is tenuous.
Parent Publication
Citation
Baker, Marc A. 2007. Further elucidation of the taxonomic relationships and geographic distribution of
Escobaria sneedii var.
sneedii,
E. sneedii var.
leei, and
E. guadalupensis (Cactaceae). In: Barlow-Irick, P.; Anderson, J.; McDonald, C., tech eds. Southwestern rare and endangered plants: Proceedings of the Fourth Conference; March 22-26, 2004; Las Cruces, New Mexico. Proceedings. RMRS-P-48CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 16-23
