Abstract :
En el estudio taxonómico del género Anastrophyllum para Colombia se registran cinco especies. A. auritum, A. nigrescens, A. piligerum, A. stellatum y A. tubulosum. El género Anastrophyllum presenta pigmentación pardo-rojiza, rojo-negruzca, ocasionalmente verde; tallos con corteza y médula diferenciadas; ramificación terminal tipo Frullania, lateral tipo Plagiochila y ventral tipo Bazzania; hojas bífidas, cóncavas, asimétricas, margen entera; células con trígonos pequeños a conspicuos. Dioicas; perianto emergente, cilindrico, plegado desde la base o solamente en la parte distal, con la boca hialina. Anastrophyllum leptodictyon es pasado a la sinonimia de A. auritum. Para cada una de las especies se proporciona una descripción detallada, ilustraciones, mapas de distribución y una clave donde se destacan principalmente caracteres del gametofito. Palabras clave. Bosque andino, hepáticas, morfología, páramo. Five species are recognized in the taxonomic study of the genus Anastrophyllum for Colombia: A. auritum, A. nigrescens, A. piligerum, A. stellatum and A. tubulosum. The genus Anastrophyllum is characterized by a reddish-brown to red-black, occasionally green, pigmentation; stems with a distinctive cortex and medulla; terminal branching of the Frullania, lateral branching of the Plagiochila-type and, ventral-intercalary branching of the Bazzania-type; leaves always bifid, concave, asymmetric; cells with inconspicuous or large to coarsely nodose trigones. Dioecious; perianth emergent, cylindrical, plicate, with a hyaline mouth. Anastrophyllum leptodictyon is synonimized to A. auritum. A key to species, based on gametophytic characters is provided and descriptions, illustrations and distribution maps are given for each species. Key words. Andean forest, liverworts, morphology, paramo.
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