Saturday, February 15, 2020

[Botany • 2020] Salvia huastecana (Lamiaceae) • A New Species from San Luis Potosí, Mexico

Salvia huastecana Bedolla, Zamudio & H.Castillo-Gómez 

in Bedolla-García, Zamudio & Castillo-Gómez. 2020. 

Salvia huastecana is described and illustrated as a new species. It is known from the municipality of Xilitla, San Luis Potosí, Mexico. This taxon belongs to Salvia sect. Angulatae, is similar to S. albiflora and S. roscida but it can be distinguished by a higher number of flowers per verticillaster (9−12), longer caducous bracts with long caudate apex, hirsute calyx with erect trichomes and white corolla, sometimes with the upper lip and margins of the lateral lobes of the lower lip light blue stained. Photographs of living plants and the illustration of the new species are provided.

Keywords: México, Salvia, Lamiaceae, Eudicots

FIGURE 1. Salvia huastecana Bedolla, Zamudio & H.Castillo-Gómez.
 A. Branch with inflorescences, B. Bract, C. Dorsal view of the calyx, D. Lateral view of the calyx, E. Frontal view of the lower lip of the corolla, F. Stamens, G. Lateral view of the corolla, H. Style, I. Mericarp. (based on H.A. Castillo, P. Castillo L. & J. Reséndiz-E. 1935 (IEB!), illustrated by Manuel Ramírez Amezcua).

FIGURE 2. Salvia huastecana Bedolla, Zamudio & H.Castillo-Gómez.
 A. Habitat, B. Lateral view of the corolla and conspicuous bracts, C. Detail of the pubescence of the calyx, D. Inflorescences (photographs taken by S. Zamudio and H.A. Castillo).

Salvia huastecana Bedolla, Zamudio & H.Castillo-Gómez, sp. nov.

 Salviae albiflorae et S. roscidae similis. Sed a priore differt inflorescentia cum 9−12 floribus in quoque verticillastro (vs. 5−9), bracteis floralibus longioribus (5.5−14 vs. 2.5−5.6 mm), apice longe-caudato (vs. acuto vel acuminato), caduco (vs. longe persistente); calyx hirsutus (vs. puberulus trichomatibus adpressus); et a altero differt corolla alba vel alba cum labio supero et labii inferi margine sublazulino (vs. albo).

Distribution and ecology:— Populations of the new species occur in two localities in the municipality of Xilitla, in the southern portion of San Luis Potosí (Fig. 3). It inhabits on limestone rock slopes with remnant elements of montane cloud forest with Clethra pringlei S.Watson, Cnidoscolus albidus Lundell, Myriocarpa sp., Podocarpus reichei J.Buchholz & N.E.Gray, Rhamnus capreifolia Schltdl. y Saurauia sp., in an elevation range from 1427–1465 m. 

Etymology:— The specific epithet “huastecana” refers to the Huasteca region, seat of the Teenek or Huasteca culture that was established more than one thousand year ago in the southern portion of San Luis Potosí (Puig 1991), area in which the species was found.

 Brenda Y. Bedolla-García, Sergio Zamudio and Hugo A. Castillo-Gómez. 2020. Salvia huastecana (Lamiaceae), A New Species from San Luis Potosí, Mexico. Zootaxa. 433(1); 1–8. DOI: 10.11646/phytotaxa.433.1.1