del Balsas, se realizó exploración de campo para recolectar especímenes botánicos que se identificaron con claves y herramientas taxonómicas y consulta de especialistas. La zona alberga 339 especies correspondientes a 225 géneros y 67 familias, de las cuales 102 especies son endémicas de México, 8 de ellas son propias de la Cuenca del Balsas y 2, restringidas a Acatlán. Esta aportación agrega 36 especies y 3 géneros al listado florístico del estado de Puebla, se redescubrió a Jatropha riojae y se encontró una especie nueva del género Senna. Las familias con mayor riqueza de especies son Fabaceae, Asteraceae, Malvaceae, Cactaceae y Euphorbiaceae, mientras que los géneros más diversos son Bursera, Ipomoea, Tillandsia, Mimosa y Solanum. El tipo de vegetación dominante es la selva baja caducifolia (SBC), en la parte alta de la sierra se encuentra un bosque de encino y pastizal en el ecotono con la SBC. También se encontró vegetación secundaria producto del uso de suelo en agricultura. Las formas de vida más abundantes son las hierbas, seguidas de los arbustos y árboles. Se registraron los nombres comunes de 94 especies. Estos hallazgos sugieren la necesidad de intensificar la exploración botánica en el municipio para incrementar el conocimiento de la diversidad vegetal y la creación de un área natural protegida.
Abstract—The recent rediscovery of Jatropha riojae, which was considered as probably extinct, led to a taxonomic re-evaluation of the species due to its problematic circumscription with respect to morphologically similar species of Jatropha section Loureira subsect. Loureira. Based on our study, J. riojae is accepted, taxonomic clarifications are made, including the designation of a lectotype for the name, a complete description of vegetative and reproductive structures is provided, and the species is illustrated and compared to others with which it has been confused. The geographical distribution of J. riojae is clarified as endemic to the municipality of Acatlán, Puebla, Mexico in the south of the Balsas River Basin. To determine the conservation status of the species, the risk assessment method of the Mexican Red List (NOM 059-SEMARNAT-2010) was applied, indicating that J. riojae should be assigned to the “Endangered” category. A re-evaluation of the species under the IUCN criteria indicated that it should be assigned in the “Critically Endangered” (CR) category.
Senna acatlanensis is described and illustrated here. This species is restricted to a forest ecotone in southern Puebla (Mexico), and stands out by its unique large asymmetric flowers, with yellow petals that do not fade away to reddish-brown as they dry-out, heteromorphic and variable androecium; with four staminodes, ten or less fertile stamens; by its pendulous, cylindrical fruits, with chartaceous strigillose valves, and inter-seminal septa with a black-pulpy endocarp that surrounds exareolate seeds. These morphological attributes in addition to leaves with two pairs of leaflets, anthers with beaks, gynoecium multi-ovulated, and transversely oriented seed, turned broadside to the septa placed this new species within the series Bacillares. Illustrations, taxonomic comments, distribution and conservation status are provided with a key to the Mexican species of series Bacillares.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.