Tetrachyron omissum y Trigonospermum alexandri, dos especies nuevas de Compositae-heliantheae del centro de México

Tetrachyron omissum and Trigonospermum alexandri are illustrated and described as new species. The first grows in northeastern Querétaro and is related to T. websteri (Wussow & Urbatsch) B. L. Turner. The second is an aquatic or subaquatic plant known only from two pools in the vicinity of t...

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Bibliographic Details
Main Authors: Rzedowski, Jerzy, Calderón de Rzedowski, Graciela, Pérez-Calix, Emmanuel
Format: Online
Language:spa
Published: Instituto de Ecología, A.C. 2008
Online Access:https://abm.ojs.inecol.mx/index.php/abm/article/view/1063
Description
Summary:Tetrachyron omissum and Trigonospermum alexandri are illustrated and described as new species. The first grows in northeastern Querétaro and is related to T. websteri (Wussow & Urbatsch) B. L. Turner. The second is an aquatic or subaquatic plant known only from two pools in the vicinity of the town of Santa Clara del Cobre in northern Michoacán. It is possibly related to T. adenostemoides Less.