espanolCon el objetivo de estudiar la fonologia y evaluar las estructuras reproductivas de 8 cultivares de frijol mungo, Vigna radiata (L.) Wilczek, se realizo un ensayo durante el periodo pluvial denominado nortes (salida de lluvias), 1999-2000, en las fincas La Coromoto y Las Marias, cuyas caracteristicas agroecologicas son tipicas de las planicies aluviales de los llanos altos occidentales y de zonas de vida del bosque seco tropical segun Holdridge. Los cultivares evaluados se denominaron Local, ML 267, VC 1973 C, VC 4443 A, VC 1178 B, VC 3541 B, Chun Nam 2 y Acriollado (provenientes del AVRDC, Taiwan). El diseno experimental utilizado fue el de bloques de azar, de lluvias con 4 repeticiones. Se evaluaron semanalmente 10 plantas sucesivas de cada cultivar; identificando las etapas de desarrollo y midiendo las variables altura de planta (AP), promedio de racimos y momento de aparicion de los racimos florales, flores abiertas y vainas por plantas. Se realizo analisis de varianza y pruebas de Duncan (P EnglishIn order to study phenology and evaluate reproductive structures of eight mungbean, Vigna radiata (L) Wilczek, cultivars, a trial was carried out during the rainy period known North (end of rainy season) between 1999 and 2000, in the farms The Coromoto and The Marias, whose agroecologic characteristics are typical of the alluvial plains of the occidentals high plains and of the areas of life of the tropical dry forest according to Holdridge. Cultivars evaluated were identified as Local, ML 267, VC 1973 C, VC 4443 A, VC 1178 B, VC 3541 B, Chun Nain 2 and Acriollado (from AVRDC, Taiwan). Experimental design was random block, with four replications. Weekly, ten successive plants on each plot were evaluated, identifying development stages and measuring plant height, average and time of appearance of flowers racemes, opened flowers and pods per plant. Variance analysis and Duncan test (P