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Portuguesa, Venezuela

Romero-Gonzalez G.A.,Harvard University | Aymard G.,Herbario Universitario
Harvard Papers in Botany | Year: 2015

Strychnos gubleri was described by François Gustave Planchon based on material collected in what is currently Amazonas state, Venezuela. Although it is one of the most widely cited species of the genus in the literature, it is not listed in Tropicos, appears as "unresolved" in The Plant List, and it was not included in the most recent flora and checklist of the region. We present here a history of the name, point out the valid description, and conclude that this taxon was described again in 1927 as S. panurensis. We also provide miscellaneous information on the species and list specimens cited in the text. © President and Fellows of Harvard College, 2015.

Aymard G.A.,Herbario Universitario
Harvard Papers in Botany | Year: 2015

A new species was detected during the examination of specimens of Doliocarpus for the Flora of Ecuador, which is is described and its morphological relationships with its closest allied species are discussed. Doliocarpus renneri, from the wet riverine forests of the Cuyabeno (Napo) river, is most similar to D. multiflorus, but differs from that species in its branches, branchlets and petioles covered by black trichomes, the obovate or elliptic-obovate leaves, the shorter inflorescence, the sessile flowers, and the sepals and petals that differ in shape and number. A previously described subspecies is elevated to the rank of species (i.e., Doliocarpus dasyanthus subsp. robustus to D. robustus), and an updated key to the species of Doliocarpus of Ecuador is provided. © President and Fellows of Harvard College, 2015.

Aymard G.A.,Compensation International Progress S.A. Ciprogress Greenlife | Aymard G.A.,Herbario Universitario | Castro-Lima F.,Compensation International Progress S.A. Ciprogress Greenlife
Harvard Papers in Botany | Year: 2015

Ampelozizyphus kuripacorum from the upper río Cuyarí, Guianía department, Colombia, is described, illustrated, and its relationship with related species discussed. This new species differs from A. guaquirensis (the only other tree species in the genus) by its larger petioles, elliptic leaves, the domatia located only in the base the midrib on the lower surface, the glands (nectaries) on the leaf blades different in form, place and size, and the shorter, few- to single-flowered inflorescence. Updated keys to identify the genera of Rhamnaceae of Colombia and the species of Ampelozizyphus are provided. © President and Fellows of Harvard College, 2015.

Baker T.R.,University of Leeds | Pennington R.T.,Royal Botanic Garden Edinburgh | Magallon S.,National Autonomous University of Mexico | Gloor E.,University of Leeds | And 61 more authors.
Ecology Letters | Year: 2014

The Amazon rain forest sustains the world's highest tree diversity, but it remains unclear why some clades of trees are hyperdiverse, whereas others are not. Using dated phylogenies, estimates of current species richness and trait and demographic data from a large network of forest plots, we show that fast demographic traits - short turnover times - are associated with high diversification rates across 51 clades of canopy trees. This relationship is robust to assuming that diversification rates are either constant or decline over time, and occurs in a wide range of Neotropical tree lineages. This finding reveals the crucial role of intrinsic, ecological variation among clades for understanding the origin of the remarkable diversity of Amazonian trees and forests. © 2014 The Authors. Ecology Letters published by John Wiley & Sons Ltd and CNRS.

Aymard C. G.A.,Herbario Universitario | Sanoja E.,National Experimental University of Guayana, Puerto Ordaz
Harvard Papers in Botany | Year: 2012

Ormosia mataridek (Leguminosae, Papilionoideae, Sophoreae s.l., Genistoid clade) from Sierra de Lema, Bolivar state, Venezuela, is described, illustrated, and its relationships with allied species in Ormosia section Ormosia are discussed. The new species is similar to the Amazonian and Guayana Shield close species O. bolivarensis and O. nobilis; however, it differs in its smaller leaflets, flowers and fruit, calyx lobes 1.5-3 mm long, the standard 8-9 mm long, and the 1-2-seeded, entire, suborbicular to ovate fruit. © President and Fellows of Harvard College, 2012.

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