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| Salvia ayecarrenoi Mart. Gord., Fragoso & de Santiago, in Martínez-Gordillo, de Santiago Gómez et Fragoso-Martínez, 2023. |
Abstract
Background and Aims: During an expedition to Atoyac de Álvarez, a poorly explored region of Guerrero, specimens of Salvia with characteristics that are uncommon in Mexican taxa were collected. The aim of this work is to describe and illustrate Salvia ayecarrenoi and discuss its morphological affinities.
Methods: Identification keys were employed to determine the collected specimens to sectional level. A morphological comparison with the taxa of the section Siphonantha was made using literature, herbaria collections and databases. The conservation state of the new species was determined based on the IUCN criteria.
Key results: Salvia ayecarrenoi is a species endemic to Guerrero, with a unique character combination: inflorescences up to 46 cm long, violet-colored flowers, ventricose tube, exserted and curved stamens. The latter characteristic is common in South American species, but rare in Mexican taxa. Thus, its morphology is close to section Siphonantha, a group of five taxa from the Northern Andes. The new species shares some morphological characteristics with Salvia sigchosica. However, it differs from it mainly by the absence of nectar guides, the ventricose corolla tube, the cucullate lower lip of the corolla and the upper stigmatic branch well-developed and longer than the inferior branch. According to the IUCN criteria, the new species is Critically Endangered (CR B1a).
Conclusions: With the description of Salvia ayecarrenoi, the number of Mexican species of Salvia subgenus Calosphace increases to 311. The morpho-logical affinities of the new species place it in a South American section. However, other sections with disjunct distribution have resulted non-mono-phyletic. Thus, it is necessary to re-evaluate the infrageneric classification of the group and the morphological characters used to circumscribe sections, with the aim of achieving more natural groupings.
Key words: cloud forest, flora, Neotropics, section Siphonantha, Sierra Madre del Sur.
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| Salvia ayecarrenoi Mart. Gord., Fragoso & de Santiago illustrated by María Teresa Jiménez Segura. |
Salvia ayecarrenoi Mart. Gord., Fragoso & de Santiago, sp. nov.
Similar to Salvia sigchosica, from which it can be distinguished by being a suffrutex of 1.5-2.5 m tall, with leaves 3.7-20 cm long; inflorescences of 14-46 cm long; bracts ovate or ovate-elliptic, long, acuminate; calyx with the upper lobe triangular, slightly acuminate; corolla lacking nectar guides, lower lip of the corolla cucullate, and upper stigmatic branch longer than the inferior.
Martha J. Martínez-Gordillo, Jesús Ricardo de Santiago Gómez and Itzi Fragoso-Martínez. 2023. Salvia ayecarrenoi (Lamiaceae), una nueva especie con estambres exsertosde Guerrero, México / Salvia ayecarrenoi (Lamiaceae), A New Species with exserted stamens from Guerrero, Mexico. Acta Botanica Mexicana. 130: e2232. DOI: 10.21829/abm130.2023.2232
https://abm.ojs.inecol.mx/index.php/abm/article/view/2232
