Rubiacearum americanarum magna hama pars XXV the nocturnally flowering psychotria domingensis-coussarea hondensis group plus three other mesoamerican psychotria species transfer to Palicourea

Several Neotropical shrubs and trees variously classified in Psychotria L. subg. Heteropsychotria Steyerm., Palicourea Aubl., and Coussarea Aubl. (Rubiaceae) share persistent stipules, apparently nocturnal flowers, well-developed white corollas with long tubes, and well-developed drupaceous fruits with two plano-convex pyrenes that generally have rather thin walls and are dorsally smooth or angled; additionally, most of these species have reduced stipules and relatively large fruits. The separation of Psychotria and Coussarea has been problematic at least in Central America, but removal here of six species from Coussarea leaves that genus characterized morphologically by 4-merous flowers and fruits with a single seed. Recent morphological and molecular surveys indicate that Palicourea and most species of Psychotria subg. Heteropsychotria comprise a single evolutionary group. These nocturnally flowering species all have the morphological features of Palicourea in this expanded circumscription and are here transferred to Palicourea along with three additional species from Mexico and Guatemala with relatively large, apparently hummingbird-pollinated flowers.

Bibliographic Details

Main Authors:	Taylor, Charlotte M. autor/a, Lorence, David H. autor/a, Gereau, Roy E autor/a
Format:	Texto biblioteca
Language:	eng
Subjects:	Rubiaceae, Angiospermae, Especies nuevas, Taxonomía vegetal, Artfrosur,
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