Features of seed coat structure of some Calanthe R. Br. species (Orchidaceae Juss.)

The results of comparative morphological investiga tions of structural characters of seed coat of 12 species of Calanthe R. Br. (Epidendroideae: Orchidaceae) with scanning electron microscope are given. On the basis of results of seed testa ultrastructure investigations of specimens examined two seed types have been recognized – Eulophia and Bletia – within selected species of Calanthe. The assumption concerning relationship between life habit of certain species and seed type within genus Calanthe was made.