A NEW AND NOTEWORTHY SPECIES OF DIOSCOREA (DIOSCOREACEAE) FROM MICHOACÁN, MEXICO

  • YOCUPITZIA RAMÍREZ-AMEZCUA Instituto de Ecología, A.C., Centro Regional del Bajío, Pátzcuaro, Michoacán
  • OSWALDO TÉLLEZ Universidad Nacional Autónoma de México
  • VICTOR WERNER STEINMANN Instituto de Ecología, A.C., Centro Regional del Bajío, Pátzcuaro, Michoacán
Keywords: Disocorea, Mexico, section Macrogynodium

Abstract

The new species Dioscorea megaphylla (Dioscoreaceae) is described and illustrated with photographs. It is known only
from the type locality, along the coastal foothills of the Sierra de Coalcomán in the municipality of Aquila, Michoacán, Mexico, where it grows in rocky canyons and hillsides with tropical subdeciduous forest at elevations of 550–600 m. As the specifi c epithet suggest, this species is distinctive due to the size of its leaves, and these are the largest within the genus Dioscorea and measure as much as 60 cm long and 65 cm wide. Unlike most members of the genus, fl owering occurs at the end of the dry season on newly produced stems before the leaves mature. Dioscorea megaphylla belongs to sect. Macrogynodium and is closely related to D. nelsonii and D. carpomaculata.

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A NEW AND NOTEWORTHY SPECIES OF DIOSCOREA (DIOSCOREACEAE) FROM MICHOACÁN, MEXICO
Published
2012-12-15
How to Cite
RAMÍREZ-AMEZCUA, Y., TÉLLEZ, O., & WERNER STEINMANN, V. (2012). A NEW AND NOTEWORTHY SPECIES OF DIOSCOREA (DIOSCOREACEAE) FROM MICHOACÁN, MEXICO. Botanical Sciences, 90(4), 381-384. https://doi.org/10.17129/botsci.470
Section
TAXONOMY AND FLORISTICS / TAXONOMÍA Y FLORÍSTICA