In Arunachal Pradesh orchids occur naturally in diverse habitats. In the rich tropical forests of the Tirap district, clusters of the beautiful blue vanda (Vanda Coerulea) adorn the trees. Their large blue - violet blooms are delicately veined. The bamboo orchid, Arundina Graminifolia, a pretty evergreen species attractive pink - purple flowers is common in open sunny areas near Tipi where an Orchid Research Centre boasts of a good collection of orchids.

Species like Dendrobium Gibsonii with its clusters of beautifully formed yellow flowers having centres of rich maroon and Dendrobium Nobile with white and purple flowers can be seen on the trees in the forests along the road from Tipi to Sessa. Sessa, 24 km from Tipi, has an Orchid Sanctuary which abounds in a variety of species including the beautiful white Coelogyne Nitida (which grows on moss covered rocks), the tree borne yellow, Cymbidium Elegans and Dendrobium Chrysanthum (bright yellow flowers with two dark reddish brown blotches in the centre) which present a magnificent sight when in bloom.