A taxonomic revision of taxa in Styrax series Cyrta (Styracaceae) with valvate corollas
DOI:
https://doi.org/10.17348/jbrit.v12.i2.962Palabras clave:
Asia, Styracaceae, Styrax, taxonomyResumen
Existen varios tratamientos taxonómicos de Styrax (Styracaceae) en floras regionales de Asia, pero las especies asiáticas del género no han sido revisadas en profundidad desde 1907. Se realizó un tratamiento de los taxa asiáticos de S. series Cyrta con estivación imbricada en 2003. Para completar la revisión taxonómica de S. series Cyrta, hicimos una revisión taxonómica de las especies de la serie con estivación valvar de la corola. Nuestra revisión comprende 11 especies con una distribución combinada desde el este de India hasta el sur de China Malasia, Melanesia y Micronesia, aunque el grupo está ausente de Filipinas. Recuperamos S. bracteolatus, S. rubifolius, y S. warburgii como especies reconocidas, y corregimos la mala aplicación de S. finlaysonianus, previamente usad para una especie en S. series Benzoin. Styrax finlaysonianus y S. warburgii son segregadas del amplio concepto de S. agrestis reconocido en tratamientos anteriores. Se clarifican las circunscripciones de las hasta ahora pobremente delimitadas especies S. confusus, S. faberi, y S. fortunei y se discuten sus posibles introgresores. Observamos combinaciones únicas de caracteres en algunos especímenes problemáticos cuyo estatus taxonómico queda sin resolver porque solo estuvieron disponibles especímenes únicos en los que estaban disponibles las flores o los frutos; al menos algunos de estos pueden representar especies no descritas. Se designan lectotipos par Cyrta agrestis, S. argyi, S. bracteolatus, S. calvescens, S. casearifolius, S. confusus var. microphyllus, S. dasyanthus, S. dasyanthus var. cinerascens, S. faberi, S. finlaysonianus, S. formosanus, S. fortunei, S. fukienensis, S. henryi, S. henryi var. microcalyx, S. iopilinus, S. philadelphoides, S. rostratus, S. rubifolius, S. serrulatus var. agrestis, y S. virgatus. Se designa un neotipo para S. warburgii. Se aportan claves, descripciones, mapas de distribución, y evaluaciones de conservación para todas las especies. Styrax agrestis, S. bracteolatus, y S. rubifolius son endemismos raros de preocupación por su conservación, con distribuciones altamente restringidas.
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