Abstract
Calaverita an endangered Mexican orchid is one of the most elegant and showy orchids of the genus Laelia and essential symbol within the local traditional celebrations of the Day of the Dead, in the region of Chilapa-Guerrero. We investigated morphological variation in flowers of la calaverita (Laelia anceps Lind. subsp. dawsonii (J. Anderson) Rolfe f. chilapensis Soto-Arenas, Orchidaceae) using the labellum of the specimens cultivated in traditional home gardens in the region of Chilapa, Guerrero, Mexico. The use of morphometric traits of the labellum is useful in appraising infra-subspecific morphological variation within the chilapensis form. Floral morphological variation exists among the specimens examined. These specimens, found exclusively in traditional home gardens, were grouped into four morphotypes: NAT, Topiltepec, Xulchuchio, and Terrero. The study of variation of la calaverita revealed the existence of four local morphotypes that originated from a long and complex process of selection of traits which responds to traditional preferences and knowledge about specific biotic and agroecological conditions. The cultural and aesthetic influence of traditional homegarden owners in the Chilapa region acts directly on selection, use and conservation of the morphological traits of la calaverita.
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