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21 December 2021 A New and Expanded Phylogenetic Analysis of Hyptidinae (Ocimeae-Lamiaceae)
José Floriano Barêa Pastore, Guilherme Medeiros Antar, Arthur de Souza Soares, Félix Forest, Raymond Mervyn Harley
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Abstract

Hyptidinae, ca. 400 species, is an important component of Neotropical vegetation formations. Members of the subtribe possess flowers arranged in variously modified bracteolate cymes and nutlets with an expanded areole and all share a unique explosive mechanism of pollen release, except for Asterohyptis. In a recent phylogenetic study, the group had its generic delimitations rearranged with the recognition of 19 genera in the subtribe. Although the previous phylogenetic analysis covered almost all the higher taxa in the subtribe, it lacked a broader sampling at the species level. Here we present a new expanded phylogenetic analysis for the subtribe comprising 153 accessions of Hyptidinae sequenced for the nuclear nrITS, nrETS, and waxy regions and the plastid markers trnL-F, trnS-G, trnD-T, and matK. Our results widely support the previous phylogenetic results with some changes in the support and relationship between genera. It also uncovers the need for a new combination of Eriope machrisae in Hypenia and the phylogenetic position of Hyptis sect. Rhytidea, which was demonstrated to be part of Mesosphaerum. The generic delimitation in Hyptidinae is discussed, and we recommend that further studies with more markers are needed to confirm the monophyly of Hyptidendron and Mesosphaerum, as well as to support taxonomic changes on the infrageneric delimitation within Hyptis s. s.

© Copyright 2021 by the American Society of Plant Taxonomists
José Floriano Barêa Pastore, Guilherme Medeiros Antar, Arthur de Souza Soares, Félix Forest, and Raymond Mervyn Harley "A New and Expanded Phylogenetic Analysis of Hyptidinae (Ocimeae-Lamiaceae)," Systematic Botany 46(4), 1086-1094, (21 December 2021). https://doi.org/10.1600/036364421X16370109698542
Published: 21 December 2021
KEYWORDS
Eriope
Hypenia
Hyptis
Labiatae
Mesosphaerum
Neotropical flora
Nepetoideae
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