Morphological Report on Gymnostomiella vernicosa (Hook. ex Harv.) M.Fleisch. (Pottiaceae) from Ranthambhore National Park, Rajasthan

This morphological report provides a detailed description of Gymnostomiella vernicosa (Hook. ex Harv.) M. Fleisch. (Pottiaceae), a rare moss species collected from Ranthambhore National Park, Rajasthan. The species is characterized by small, dioicous, light-green plants that grow in mats or tufts. The stems are reddish-brown, with leaves that are spathulate to oblong, having a broadly rounded apex and flat, plain margins. The moss exhibits distinct cell patterns, with upper lamina cells being papillose and basal cells being smooth and long-rectangular. Gymnostomiella vernicosa thrives in terrestrial habitats, particularly on moist rocks, and has a wide geographical distribution, including regions in India, East Nepal, Bhutan, China, and beyond. The species’ occurrence in Rajasthan is significant, as it represents one of the few bryophytes adapted to the state's xerothermic climate. This report adds to the knowledge of bryophyte diversity in Rajasthan, particularly in the Ranthambhore region.