The state is known for its rich orchid flora. In order to develop this natural resource in a sustainable manner, the division of Orchidology is engaged in documentation, scientific studies and extension activities aimed at technological development in orchid farming and floriculture with people’s participation and contribute towards economy of the local people. Significant achievements are:

•	Surveys, documentation and habitat studies of orchids – 605 species
•	Surveys, documentation and habitat studies of orchids – 605 species
•	Discovering and describing 34 new species, Two new genus and 150 new records of occurrence
•	Establishment of Sessa Orchid Sanctuary -100 sq.km for in-situ conservation.
•	Establishment of Orchidaria in 8 different zones for ex situ conservation
•	Cultivation and propagation of over 2 lakh orchids.
•	Establishment of two Tissue culture labs at Tipi & Itanagar
•	Standardization of protocols of micropropagation for 65 species of Aerides, Arachnis, Ascocentrum,Cymbidium,Dendrobium, Esmeralda, Vanda, Renanthera and their hybrids
•	Breeding & development of 15 hybrids; Five new hybrids registered viz 1. Renades ‘Arunoday’, Arachnocentron ‘Tipi jubilee star’, 3. Esmeranda ‘Millenium Dawn’, 4. Ascocenda ‘Tipi Blue boy’, 5. Cymbidium Sessa ‘Green Beauty’.
•	Induction of polyploidy in 4 Vandaceous genera.
•	Extension and development of six Cymbidium farms involving local entrepreneurs and women.
•	Introducing capsule course in tissue culture of Orchids.
•	Organizing Festival of Flowers 5 times during last one decade.
•	Publication of two books, two booklets, 140 research papers, several folders , Stickers and publicity materials.
•	Development of ORC, Tipi as a Botanic Garden and Tourist Center

Since 1994, besides State plan project, orchidology divission has started implementing projects sponsored by various external govermental and non-govermental agencies likeWWF-India, ICFRE, DST, DBT, NBRI etc. for various research and extention activites on orchids in state. Till now, the divission has carried out/ being carried out 11 projects.

i.	In situ conservation : Out of about 600 species of orchids reported so far from Arunachal Pradesh, about 400 species are being conserved in situ in the Protected Area Network of the State. About 200 species are recorded from Sessa Orchid Sanctuary alone. Tours are being conducted every year in unexplored areas to enumerate the orchid flora of various sanctuaries, national parks and biosphere reserves of the state.
ii.	Ex situ conservation : About 50,000 orchids of about 200 species are rescued from degraded forest areas and brought under cultivation at Orchid research centre, Tipi; Orchid nursery, Sessa; Orchid range, Dirang; SFRI, Itanagar as a part of Ex situ conservation as per the climatic requirement of the species.
iii.	Orchid germplasm bank: Created at Orchid Research centre, Tipi. This is one of the largest orchid germplasm banks in the country comprising of about 200 native tropical species, 60 exotic species and about 50 exotic hybrids of various groups.Various new species discovered from Arunachal Pradesh and various hybrids developed at Orchid Centre, tipi can be seen under cultivation here.

i.	Production of Seedlings : Over the last 15 years, it has been possible to standardize protocols for the in vitro culture (seed and tissue) of 50 rare, endangered and ornamental orchids, 10 native hybrids and 14 Cymbidium hybrid mericlones, 2 exotic Phalaenopsis hybrids and one Dendrobium hybrid. Technique have also been standardized for regenerating seedlings from auxilary bud of Aerides rosea and from leaves of Renades 'Arunodaya'. Thus over 1,60,000 seedling micropropogated and transferred from the lab to the field.
ii.	Breeding : Over the last twenty years, it has been possible to produce 15 inter and intrapecific hybrids and two hybrid genera. out of them, five hybrids have so far been registered under the international Registration Authority for orchid Hybrids by the Orchid registrar, Nottingham, U.K.
iii.	Polyploidy & Orchid Mycorihiza: Research studies are in progress on induction of polyploidy in commercially viable orchids; and on possibility of use of orchid mycorhiza for improved cultivation and successful establishment of laboratory produced seedlings in the field.
iv.	Taxonomy: During the past 25 years, 2 new orchid genera, 34 new species, 30 new records to India and about 130 new additions to Arunachal Pradesh have been reported.

*	New Genera: India A.N.Rao; Jejosephia A.N.Rao et Mani
*	New Species: arunachalensis A.N. Rao; Biermannia jainiana Hegde et A.N. Rao; Cherostylis gunnarii A.N. Rao ;; Cherostylis sessanicca A.N. Rao ;; Cherostylis munnacampensis A.N. Rao; Cherostylis tippica A.N. Rao; Cleisostoma tricallosum Hegde et A.N. Rao; Diplomeris josephii A.N.Rao et Swamy ; Eria arunachalnesis A.N. Rao; Eria connata Joseph, Hegde et A.N. Rao; Eria jengingensis Hegde; Evrardia asraoa Joseph et A.N. Rao; Eria Lohitensis A.N. Rao et al; Eria Kamlangensis A.N. Rao; Epipogium sessanum Hegde et A.N. Rao; Erythrodes seshagiriana A.N. Rao; Gastrochilus arunachalensis A.N. Rao; Gastrochilus sessanica A.N. Rao; Gastrodia arunachalensis Hegde et A.N. Rao; Gastrodia mishmensis A.N. Rao et al.; Herminium haridarshanii A.N. Rao; Herminium kamenggensis A.N. Rao; Herminium longilobatum Hegde et A.N. Rao; Ione arunachalense A.N. Rao; India arunachalensis A.N. Rao; Nervilia gledowii A.N. Rao; Oberonia arunachalensis A.N. Rao; Oberonia kamlangensis A.N. Rao; Oberonia katakiana A.N. Rao; Porpax siedenfadenii A.N. Rao; Rhomboda arunachalesis A.N. Rao; Sarcoglyphis arunachalensis A.N. Rao; Taeniophyllum arunachalense A.N. Rao et J. Lal; Zeuxine lindleyana A.N. Rao;
*	Herbarium : A Herbarium has been established at Orchid centre, Tipi. It contains about 3,000 accession representing about 400 species and about 100 genera of orchid including about 30 type specimen of orchid new species discovered from Arunachal Pradesh