Abstract: In this paper, five Grimmiaceae mosses are observed and analized in the aspects of anatomical structure of stem and leaf by means of paraffin wax section and scanning electron microscopy. The cuticular wrinkles, ornamentation and pore on the leaf surface are observed. Meanwhile the stem structure is also studied. Above features are considered to be of faxonomic significance in the bryophtes. The stem of Grimmia elongata Kaulf. is multicarpsular. The filaments are linked together into strip form along the epidermis of antical leaves, while the cuticular ornamentations ventral leaves are with the apperance of radial lobe. The cell content in stems and leaves of Grimmia apocarpa Hedw. is so thick and the cell is dishyaline. The cuticular ornamentations on the costa of this species is streamline. The costa of leaves of Grimmia alpicoda Sw. ex Hedw. are broad and thick and the pores are arranged in ladder-shaped. The scabrous cuficular wrinkles on the ventral surface of leaves are in the ornamentation just like chrysanthemum and the entrance to pores are covered by scale flake. In Grimmia ovalis(Hedw.) Lindh, The hydrome cell developed well and axial part of stem is not distinct; meanwhile the leaf surface is covered densely by rugged papilla and pores which are sinked in depth and arranged in web form are so large. There is a layer of sheathing substances between external cortex and internal cortex in the stem of Gimmia pilifera P. Besuw. The pore's shape on the ventral surface of leaves of this species is packed close together.

Key words: Grimmiaceae, stem, leaf, anatomy