Abstract: The epidermal structures of the six species of Coniogramme in Hemionitidaceae were investigated under light and scanning electron microscopes.The results indicate that: There are no trichome on both upper and lower epidermis of leaves in the six species; There are 7 types of stomatal apparatus(Polocytictype, Axillocytictype, Aisocytictype, Anomotetracytictype, Copolocytictype, Coaxillocytictype and Anomocytictype), the components of stomatal apparatus are polymorphic, all the stomatal apparatuses only occur in the lower epidermis, no caved in; Their epidermal cells are irregular, anticlinal walls undulate or sinuate. The six species of Coniogramme are different in the size of cell of leaf epidermis, the size of stomatal, Stomatao density and Stomatal index.These provide evidences for systematics of Coniogramme.

Key words: Coniogramme, leaf epidermis, stomatal apparatus, Hemionitidaceae