Abstract
The family of Yams (Dioscoreaceae) has many species of high nutritional value. Most of which are used as food or medicine (Maynard and O’Hair, 2003; Gupta et al., 2012). Two-year (2016-2017) field trip survey in Bay Nui region (An Giang province), through six places (six habitats - ravines, canyons short-cuts, domestic gardens, residential areas and forests – was surveyed at one place), recorded eight wild species of Dioscoreaceae. The results showed that seven of eight species are used as medicinal plants, and another species is listed in “Vietnam’s Red Data Book” (2007). Morphological data showed diversity of leaf, stem, and tuberous root. An analysis of leaf anatomy showed that these species are different in terms of size, number, arrangement of epidemis cells of blade edges, and vascular bundles structure of leaf veins and petiole. This difference was also reflected in the xylem structure of leaf veins and petiole, and thickness of schlerenchyma.
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