Abstract Detail

Evolutionary History, Biogeography, and Floral Morphometrics of Salvia (Lamiaceae)

González-Gallegos, Jesús G. [1].

Diversity and new insights towards a new classification of Salvia subgenus Calosphace (Lamiaceae).

Salvia L. is integrated by four major clades, one of these matches the widely recognized Salvia subgenus Calosphace (Benth.) Epling, this is the richest within the genus. This group is distinctive in having only two fertile thecae disposed in the top of each anterior arm of the connective of the two stamens (except for Salvia axillaris Moc. & Sessé, which sometimes have two additional vestigial thecae in the posterior connective arms), whereas the posterior branches are connate to each other. Calosphace is an American taxon with some species behaving as alien plants worldwide (S. coccinea Buc’hoz ex Etl., S. misella Kunth, S. tiliifolia ­Vahl) or cultivated as ornamental (S. coccinea, S. greggii A.Gray, S. guaranitica A.St.-Hill. ex Benth., S. leucantha Cav., S. macrophylla Benth., S. microphylla Kunth. and S. vazquezii H.H.Iltis & Ramamoorthy, being the most popular). In 1939, Epling explicitly erected Calosphace to the category of a subgenus and presented the most comprehensive and recent taxonomic treatment, which he and his colleagues complemented with subsequent publications. They also presented a classification system in which they divided the group in more than 100 sections (some of them also including subsections), circumscribed based on the following main characters: persistent of ephemeral nature of floral bracts, number of veins in the upper calyx lip, length proportion between both corolla lips, entire or invaginated nature of the corolla tube, inclusion or extrusion of the stamens from the upper corolla lip, ornamentation of the connective, indument of the style, and proportion and shape of the stigmatic branches. However, several phylogenetic analyses have shown that Epling’s classification is far from natural. Based on the revision of the results of these analyses and specialized literature, here are sketched the general lines for a new classification for the group and guidelines of how to proceed in future phylogenetic approaches in order to complete and make more robust the rearrangements within Calosphace. Also it is presented and updated checklist of the diversity of the clade, highlighting those species with uncertain taxonomic delimitations that should be studied in detail.

1 - Cátedras CONACYT - Instituto Politécnico Nacional, CIIDIR - Durango, Academia de ecología y sistemática, Sigma 119, 20 de Noviembre II, Durango, Durango, 34234, Mexico

Keywords:
Salvia taxonomy
Salvia subg. Calosphace
American Salvia.

Presentation Type: Colloquium Presentations
Session: C09, Evolutionary history, biogeography, and floral morphometrics and Salvia (Lamiaceae)
Location: 105/Mayo Civic Center
Date: Wednesday, July 25th, 2018
Time: 9:15 AM
Number: C09006
Abstract ID:902
Candidate for Awards:None