The present paper deals with comparative distribution of orchid species with their number in each district such as West Kameng- 443, Lower Subansiri- 26, Changlang- 39, Upper Siang- 37, Tawang- 14, East Kameng- 95, Upper Subansiri- 9, Anjaw- 19, Tirap- 36, Siang- 7,
Longding- 4, Lohit- 17, Namsai- 10, West Siang- 3, Papum Pare- 13, Shi-Yomi- 12, Lower Dibang Valley- 4, and Kurung Khumey- 20. The paper also deals with listing of specimens and type specimens such as Holo type, Para type, and lso type available in Orchid Herbarium Tippi (OHT). Further, herbaria of state, regional, and national has the reference of OHT as a specimen repository to ARLIN, APFH, ASSAM, and CAL. The present study was an attempt to provide district wise information on orchids in atleast 1-3 localities of collection sites with their wide range of geographical location and altitude; the study is based on frequent field trips upto the border of neighbouring countries with the state. The state is known to have a total of 568 species in141 genera based on specimens available in OHT collected from different parts of the state. Out of these, 383 species in 77 genera are epiphytes, 161 species in 52 genera are terrestrial, and 24 species in 24 genera are mycoheterotrophs.