<p><strong>A new <em>Agave </em>species (Asparagaceae, Agavoideae), from southern Oaxaca, Mexico</strong></p>

Abstract

A new species, Agave calciphila, endemic to the limestone hills north of Nizanda, Oaxaca, Mexico, is described. Its vegetative and flower morphology place this species in the section Heteracanthae, and close to Agave angustiarum, A. ghiesbreghtii, and A. huehueteca. After a comparison with these three species, A. calciphila was found to have shorter sterile peduncle and flowers.

Agave rosalesii (sect. Inermes , Asparagaceae), segregated from Agave ellemeetiana K. Koch (sect. Choritepalae ): a new species from the Mixteca Alta of western Oaxaca, Mexico

“…The collections of flowers were made in December 2011 and of the rosette morphology and variability in April 2014. After an analysis of the morphological structures of these plants, we compared with similar Agave species treated in taxonomic reference works, particularly spineless or soft-spined ones (Gentry 1982, Vázquez-García et al 2007a, b, Thiede 2001, 2020, as well as with digital images of specimens deposited in the herbaria ARIZ, CORU, MEXU, MO, US, XAL and ZSS.…”

“…); six of the 30 sections in the subgenera Agave and Littaea (Thiede et al 2019) include 70 % of the newly described species: 10 in A. sect. Heteracanthae Salm-Dyck (Galván-Villanueva & Hernández-Sandoval 2002, Vázquez-García et al 2007a, González-Elizondo et al 2011), Hernández-Sandoval & Magallán-Hernández 2015, García-Mendoza et al 2019, Hernández-Vera et al 2019, Starr & Davis 2019, Starr 2020, followed by eight in A. sect. Juncineae Salm-Dyck (Zamudio-Ruiz & Sánchez-Martínez 1995, García-Mendoza & Martínez-Salas 1998, Carrillo-Reyes et al 2003, Cabral-Cordero et al 2007, Galván-Villanueva & Zamudio-Ruiz 2013, García-Mendoza & Chávez-Rendón 2013, Starr et al 2018, García-Morales et al 2019, seven in A. sect.…”