Phylogeny of the tribes Juanulloeae and Solandreae (Solanaceae)

Abstract

The tribe Juanulloeae is composed of seven to nine Neotropical genera of lianas and epiphytic or terrestrial shrubs that exhibit a wide variety of floral morphologies and pollination syndromes. Their commonly epiphytic habit in the forest canopy and relatively infrequent flowering has resulted in few and fragmentary specimens and has complicated taxonomic study of the tribe so that many of its genera remain poorly understood. Solandra, currently included in the monotypic tribe Solandreae, is morphologically very similar to the Juanulloeae but its phylogenetic affinities are unclear. In this study, a phylogeny of the Juanulloeae and Solandra was inferred from maximum parsimony and Bayesian analyses of nuclear and plastid DNA sequences (ITS, waxy, trnT‐trnF, rps16‐trnK). Solandra was strongly supported as sister to the Juanulloeae and the two tribes are combined here under the older name Solandreae. Many genera within the group, notably Juanulloa, Markea, and Trianaea, are not monophyletic as currently circumscribed. We review the morphological characteristics of the genera and clades in light of the phylogenetic evidence presented here and highlight the need to re‐evaluate the morphological characters used to delimit genera of the tribe. On the basis of our results, we propose to (1) broaden the circumscription of tribe Solandreae to include tribe Juanulloeae, (2) recognize nine genera in the Solandreae, including the reinstatement of Poortmannia and Hawkesiophyton, and (3) make two new species‐level combinations, propose one new species‐level synonym, and designate a lectotype for Trianaea neovisae.

IAPT chromosome data 31

“…The count of 2n = 24 and chromosome morphology of Trianaea nobilis, of the Solandreae (Orejuela & al., 2017), are congruent with the data previously found in two other members of the tribe (Piovano, 1989;Acosta & Moscone, 2000) and fit with the general pattern of the "x = 12 clade" where Solandreae are placed (see Särkinen & al., 2013). The tribe includes ca.…”

Flora das cangas da Serra dos Carajás, Pará, Brasil: Solanaceae

“…Gênero quase exclusivamente amazônico, possui três ou quatro espécies descritas que se distribuem pelo norte da América do Sul, ocorrendo até ca. de 600 m de altitude em formações florestais bem preservadas (Hunziker 2001;Orejuela et al 2017). Seu reconhecimento foi muito discutido em sistemas de classificação propostos, sendo tratado como parte de Markea Rich., mas um estudo filogenético recente aponta para seu monofiletismo com alto suporte (ver Orejuela et al 2017 para detalhes).…”

Monograph of Doselia (Solanaceae), a new hemiepiphytic genus endemic to the northern Andes

“…80 species of mainly epiphytic or hemi-epiphytic lianas and shrubs in a number of genera currently being recircumscribed (Orejuela et al 2017;Orejuela et al in prep). The group is restricted to the Neotropics, with species distributed from Mexico and the Caribbean to Bolivia and southern Brazil (Orejuela et al 2017). A centre of endemism for the tribe lies in Andean Ecuador and Colombia, where ca.…”

“…A centre of endemism for the tribe lies in Andean Ecuador and Colombia, where ca. 60% of the species are found (Orejuela et al 2017).…”