Comparative vegetative anatomy of Blue Vanda (Vanda coerulea Griff. ex Lindl.) and Red Vanda (Renanthera imschootiana Rolfe.).

摘要

A comparative anatomical study, on the leaf and roots of two endangered orchids namely - Blue Vanda (Vanda coerulea Griff. Ex Lindl.) and Red Vanda (Renanthera imschootiana Rolfe.), was done. In both the species, the stomata are anomocytic, vascular bundles are arranged in a single series in leaves, while vascular strands are radial in roots. The vegetative anatomical characters, such as distribution and colour of sclereids as well as number of vascular bundles in leaves, presence or absence of striated velamen cells and the number of cortical cell layers in roots, are found helpful in distinguishing the studied orchid taxa.