A study of the polen of Phaseolus chiapasanus Piper (Leguminosae, Phaseolinae)

  • Alfonso Delgado-Salinas Department of Botany, University of Texas
  • Enrique Martínez-Hernández Laboratorio de Palinología, Insitutto de Geología, Universidad Nacional Autónoma de México
  • Pilar Fernández-Ortuño


In the course of a taxonomical revision of the genus Phaseolus and considering the recently important research realized in the Phaseolus-Vigna complex, where the palynological attributes for the genus were precised, the present paper describes the pollen of Phaseolus chiapasanus Piper. The large-size class pollen grains of Ph. chiapasanus are tricolporate, brevicolpate, pseudo-operculate; semitectate, and widely reticulate. The structure of the infratectum could be considered of the granular-collumelar type. Some of the attributes found in the polen of Ph. Chiapasanus were not known for the genus, though such attributes are commonly found in the subgenus Sigmoidotropis of the genus Vigna. Ph. chiapasanus shows a series of morphological and palynological differences that open the possibility for the creation of a new section within the genus. More detailed studies will definitely by needed to better document relationships to other species of the genus.


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A study of the polen of Phaseolus chiapasanus Piper (Leguminosae, Phaseolinae)
How to Cite
Delgado-Salinas, A., Martínez-Hernández, E., & Fernández-Ortuño, P. (1982). A study of the polen of Phaseolus chiapasanus Piper (Leguminosae, Phaseolinae). Botanical Sciences, (43), 25 - 34. https://doi.org/10.17129/botsci.1265