A preliminary systematic analysis of leaf epidermal characters for six Smilax species in Thailand
Bruce Roger Moorea,*, Theeraporn Moorea, Nual-Anong Narkkongb
ABSTRACT: Accurate identification of Smilax (Smilacaceae) species in Thailand is mostly dependent on plants of both sexes being collected in the right reproductive phase. To explore an alternative method, abaxial and adaxial leaf surfaces of six Smilax species were examined for delimiting architecture. Five taxa have individually unique abaxial reticulums and all species presented different abaxial ornamentation such as papillae, granulae, and bullae. Likewise, stomatal ultra-structure varied remarkably between each species. These results strongly suggest that at least some Thai Smilax possess taxonomically useful cuticular features.