Yucca carnerosana, commonly known as Carneros Yucca or Giant Spanish dagger, is a species of yucca of the far southeastern Chihuahuan Desert. The species occurs in northeastern Mexico (Coahuila, Durango, Zacatecas, Nuevo León).Encyclopedia of life, Giant Spanish DaggerEspejo Serena, A. & López-Ferrari, A.R. (1993). Las Monocotiledóneas Mexicanas una Sinopsis Florística 1(1): 1-76. Consejo Nacional de la Flora de México, México D.F.
Yucca carnerosana is a large arborescent yucca, sometimes branched, up to 20 feet tall, with snowy white flowers.Texas Native Plants Database, Yucca carnerosana
Taxonomy Trelease described the genus Samuela based on two species, Samuela faxoniana (now Yucca faxoniana) and S. carnerosana (now Yucca carnerosana).
The 2025 paper "Phylogenetic relationships and character evolution in Yucca (Agavoideae, Asparagaceae)" by Ayala-Hernandez et al. analyzed genetic data and found Yucca carnerosana and Yucca faxoniana to not only be distinct species, but of different lineages and not closely related to each other.
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External links
photo of herbaruim specimen at Missouri Botanical Garden, collected in Nuevo León, Mexico, Yucca carnerosana