Topic
Alloneuron
About: Alloneuron is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 49 citations.
Papers
TL;DR: It is found that these four genera form a well-supported group that can be diagnosed by the unique character combination of haplostemonous flowers, inferior ovaries, and capsular fruits, and this character combination and the phylogenetic position of this clade within the family warrant the recognition of the tribe Cyphostyleae.
Abstract: In the Melastomataceae, flowers with superior ovaries usually develop into capsular fruits, while flowers with inferior or partially inferior ovaries develop into berries. The phylogenetic position and affinities of four enigmatic genera with inferior ovaries and capsular fruits, Allomaieta, Alloneuron, Cyphostyla, and Wurdastom, were investigated using three plastid loci (rbcL, ndhF, and rpl16) and morphological characters. These four genera have been placed at times in their own tribe, the Cyphostyleae, but they have also been placed in the Miconieae, and whether they form a group at all has also been the subject of debate. We find that these four genera form a well-supported group that can be diagnosed by the unique character combination of haplostemonous flowers (same number of anthers and petals), inferior ovaries, and capsular fruits. Most members of the tribe also have a calyptrate calyx, but the mode of dehiscing of the calyx varies across species. This character combination and the phylogenetic p...
44 citations
TL;DR: Wurdastom is a small genus of trees and shrubs from central-west Colombia to northern Peru where it grows in Andean and humid lowland tropical forests as discussed by the authors.
Abstract: Background and Aims: Wurdastom is a little-known neotropical genus, which is poorly represented in herbarium collections. A historical summary,discussion about the tribal position, taxonomic review, and a conservation assessment of each species of the genus was carried out.Methods: Wurdastom specimens of 17 herbarium collections from Colombia (CAUP, COAH, COL, CUVC, FMB, HUQ, PSO, UDBC, UPTC, VALLE), Ecuador (QCA, QCNE), and the United States of America (CAS, F, MO, NY, US) were reviewed, and relevant type collections available at JSTOR Global Plants were consulted. An identification key, descriptions, illustrations and distribution maps for each species were developed. IUCN guidelines and criterio were used for conservation assessments of each species.Key results: In total, 52 Wurdastom collections were found in the revised herbaria. A new species from Colombia is described and new isotypes from the VALLE Herbarium are reported here for the first time. Wurdastom is a small genus of trees and shrubs from central-west Colombia to northern Peru where it grows in Andean and humid lowland tropical forests. The genus, which is assigned to the tribe Cyphostyleae, is characterized by the acrodromous venation, barbellate trichomes on vegetative parts and inflorescences, multiflorous thyrsoid or pleiothyrsoid inflorescence, haplostemonousflowers, petals ≤1 cm long, inferior ovaries, and capsular fruits.Conclusions: Wurdastom includes eight neotropical species, most of them with restricted distributions. One species is assessed here as Threatened (W. sneidernii), two as Vulnerable (W. cuatrecasasii, W. dudleyi), and the rest are treated as Data Deficient.
9 citations
TL;DR: A new species of Melastomataceae from the Marañón Valley in northern Peru that can be quickly recognized and differentiated from other species in Alloneuron by the presence of pseudo-glomerulate inflorescences.
Abstract: Alloneuron glomeratum, a new species of Melastomataceae from the Maranon Valley in northern Peru, is described and illustrated. This new species can be quickly recognized and differentiated from other species in Alloneuron by the presence of pseudo-glomerulate inflorescences.
7 citations
TL;DR: The new genus Quipuanthus seems to be related to Allomaieta, Alloneuron, and Wurdastom in the tribe Cyphostyleae, but the combination of characters as an herb with haplostemonous flowers, recurved style, inferior ovary and apically dehiscent capsular fruits is unique among the Melastomataceae.
Abstract: The new genus Quipuanthus from the foothills of the eastern Andes of Ecuador and Peru is described. Quipuanthus seems to be related to Allomaieta, Alloneuron, and Wurdastom in the tribe Cyphostyleae, but the combination of characters as an herb with haplostemonous flowers, recurved style, inferior ovary and apically dehiscent capsular fruits is unique among the Melastomataceae. The new species Quipuanthus epipetricus is described and illustrated.
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| Year | Papers |
|---|---|
| 2020 | 1 |
| 2016 | 1 |
| 2014 | 1 |
| 2011 | 1 |