Variación morfológica del género Prochnyanthes (Agavaceae)

[摘要] The morphologic variation of the genusProchnyantheswas analyzed by means of the examination of 29 characters, in a sample of 544 individuals from 19 localities. The Principal Components Analysis was used, which shows the variation trends, analyses the similarities among the classification units and identifies groups. Based on the morphological evidence, it was possible to recognize two phenotypes, considered as extremes of a morphological cline. Therefore, the morphological species concept ofP. mexicanawas broaden to include all the variation observed. Finally, the size and color of the perianth and the length of the pedicels did not show enough variation to identify groups and consequentlyP .mexicanais the only recognized species of the genus.

[学科分类] 植物学

[关键词] Agavaceae;análisis de componentes principales;morfología;Prochnyanthes