Anatomía foliar y caulinar en especies de Stemodia (Scrophulariaceae)

comparative anatomical studies of the leaves and stems on the genus stemodia are presented. seven species are considered: s. ericifolia (kuntze) k. schum., s. hyptoides cham. & schltdl., s. lanceolata benth., s. lobelioides lehm., s. palustris a. st.-hil., s. stricta cham. & schltdl. and s. verticillata (mill.) hassl. there are variation in the stomatal and trichome types, form of the papillae and mesophyll structure. four trichome types are described and illustrated considering if they are glandular or non-glandular and the number of cells. the stems present a quite homogeneous anatomical structure. some differences in the amount and distribution of the aerenchyma and the size of the intercellular spaces are observed.