Anatomical features a moth orchid, Phalaenopsis deliciosa subsp. hookeriana (O. Gruss & Roellke) from Tripura, Northeast India

Phalaenopsis deliciosa subsp. hookeriana a moth orchids, is reported for the first time from Tripura. Present study deals with its anatomical description of the aerial root and leaf internal structure. The collateral vascular bundle in leaf which is surrounded by homogenous mesophyll, epidermis and cuticle were examined. The anomocytic type of stomata are present in this species and estimated stomatal density was 2.1/92.9 mm² and stomatal index was 3.71%. The root anatomical study revealed that it having uniseriate velamen as additional adaptivefeature. Pelotons of mycorrhzia were also identified in the root cortex. This species blooms in Agust to September in moist deciduous forest of Atharomura at an altitude of 145m amsl on the trunk of Artocarpus chama Buch. Ham.