Topic
Plerandra
About: Plerandra is a research topic. Over the lifetime, 3 publications have been published within this topic receiving 41 citations.
Papers
TL;DR: The genus Plerandra is expanded to encompass all of the members of one of these clades within the family Araliaceae, and a new infrageneric classification is presented in which six subgenera are recognized.
Abstract: Phylogenetic studies have demonstrated that Schefflera, the largest genus of Araliaceae, is grossly polyphyletic, comprising five distinct clades within the family. In an effort to establish monophyletic genera among the elements that currently comprise Schefflera, the genus Plerandra is expanded to encompass all of the members of one of these clades. In this synoptical revision, a new infrageneric classification is presented (along with a key) in which six subgenera are recognized. Four of these subgenera are newly described (Plerandra subgenera Canacoschefflera, Costatae, Gabriellarum, and Veilloniorum) and a fifth represents a new combination (Plerandra subg. Dizygotheca). A total of 33 species (one with two subspecies) are accepted, one of which is newly described (P. veilloniorum), and 22 new combinations are made (P. actinostigma, P. baillonii, P. cabalionii, P. costata, P. crassipes, P. elegantissima, P. elongata, P. emiliana, P. gabriellae, P. leptophylla, P. nono, P. osyana, P. osyana subsp. toto, P. pachyphylla, P. pancheri, P. plerandroides, P. polydactylis, P. reginae, P. seemanniana, P. tannae, P. vanuatua, P. veitchii). Neotypes are provided for six accepted names and one heterotypic synonym, and lectotypes are designated for 13 accepted names and 16 heterotypic synonyms. For each accepted species, full synonymy is provided along with geographic range and notes.
22 citations
TL;DR: Two new genera of Araliaceae are described, Cephalopanax and Frodinia, which have two accepted species each and have two new combinations of accepted species made.
Abstract: Until recently, Schefflera was the largest genus in Araliaceae (with more than 600 described species), but with a growing understanding of its polyphyly, the circumscription of Schefflera had to be limited to just eight closely related species from the Pacific Islands. To restore monophyly, it was necessary to transfer the remaining, unrelated species to other genera. In most cases, these transfers could be accommodated by resurrecting generic names that had previously been placed in synonymy (namely, Astropanax, Crepinella, Didymopanax, Heptapleurum, Neocussonia, Plerandra, and Sciodaphyllum). For two small Neotropical clades, however, no generic name was available, and for these, we describe two new genera of Araliaceae, Cephalopanax and Frodinia. As defined here, these genera have two accepted species each, for which four new combinations are made (C. jahnii, C. pachycephalus, F. gleasonii, and F. tremula). Lectotypes are designated for two accepted names, and one previously accepted species (Schefflera cuatrecasasiana) is placed in synonymy. For each accepted species, full synonymy is provided, together with geographic ranges and notes.
4 citations
TL;DR: Results confirm the monophyly of four of the five informal groupings within the Melanesian Schefflera clade, but rDNA data do not agree with morphology in regard to the fifth group, ‘Dizygotheca,’ which appears polyphyletic in the cladograms based on ITS and ETS sequences.
Abstract: The Pacific species of the polyphyletic genus Schefflera belong to three main clades, of which the Melanesian Schefflera clade is best represented in the archipelagos of New Caledonia, Fiji, Vanuatu, and the Solomon Islands. Previous studies have helped to establish the monophyly of Melanesian Schefflera, but an informal, morphology-based classification system that recognizes five subgeneric groupings within this clade remains largely untested. To examine relationships among Melanesian Scheffleras, DNA sequence data from two spacer regions (ITS and ETS) of the nuclear rRNA genes were gathered from a nearly comprehensive sample of species and analyzed phylogenetically. Results confirm the monophyly of four of the five informal groupings, including ‘Plerandra’ (from Fiji, Vanuatu, Solomon Islands, and New Guinea), ‘Gabriellae’ (from New Caledonia, Fiji, and Vanuatu), ‘Canacoschefflera’ (New Caledonia), and ‘Dictyophlebes’ (Fiji and Solomon Islands). However, rDNA data do not agree with morphology i...
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2013 | 1 |
| 2012 | 1 |