Species of Dendrobium are revised to 50 from 37 based on the specimens deposited in herbaria namely National- Central National
Herbarium (CAL) Howrah; Regional- herbarium of the Eastern Regional Centre of the Botanical Survey of India (ASSAM), Shillong; and
State- Orchid Herbarium of the Tropical Forest (OHT), Tipi, West Kameng (Arunachal Pradesh), and Arunachal Pradesh Regional Centre
of the Botanical Survey of India (ARUN). The number of specimens is 359 in CAL representing 21 species representing, 251 in ASSAM,
and 240 specimens representing 41 species in OHT. The present communication reports examination of specimens for each Dendrobium
species reported from Arunachal Pradesh.