Phylogenetic relationships in the tribe Buddlejeae (Scrophulariaceae) based on multiple nuclear and plastid markers.

CHAU, J.; O'LEARY, NATALY; WEIBANG, S.; OLMSTEAD, RICHARD

BOTANICAL JOURNAL OF THE LINNEAN SOCIETY

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2017 vol. 184 p. 137 - 166

0024-4074

Tribe Buddlejeae is a widely distributed group withca. 108 species comprising five commonly accepted genera, Buddleja, Chilianthus, Nicodemia, Gomphostigma, and Emorya.Conflicting generic- and infrageneric-level classification systems based onmorphology attest to a need to evaluate relationships and trait evolution in aphylogenetic framework. We usemultiple independent loci from the nuclear and plastid genomes and expanded,representative taxonomic sampling to infer a phylogeny. Nicodemia and Gomphostigmaare confirmed as monophyletic. Chilianthusis likely paraphyletic with respect to at least Buddleja auriculata. Buddleja is found to be paraphyleticwith respect to Emorya, Nicodemia, and possibly Chilianthus. To reflect relationshipswith Buddleja, a new name and newcombination for species in Emorya areproposed: Buddleja normaniae and Buddleja rinconensis. Inaddition, two new monotypic sections in Buddlejaare proposed: Salviifoliae and Pulchellae. Severalfeatures of reproductive morphology traditionally used to define groups,including stamen exsertion, corolla shape, and inflorescence type, have been evolutionarilylabile and exhibit independent convergence on similar states.