A new species of Impatiens (Balsaminaceae), Impatiens lohitensis R. Gogoi & S. Borah is described and illustrated from Arunachal Pradesh, India. It is close to I. siculifer Hook.f. and I. stenantha Hook.f. but differs in perennial nature, bigger elliptic leaves, green flower bud without awn, bigger sized flower, green bigger floral bract, lateral sepals navicular, abaxial midvein of upper petal thickened, much longer spur, two red blotch at throat and bigger size of linear capsule.
KEY WORDS: Arunachal Pradesh, Impatiens, India, new species.
Distribution: India: Arunachal Pradesh: Lohit District, after Udayak Pass way to Tidding.
Etymology: The species is collected from Lohit district of Arunachal Pradesh, hence the species epithet is given for its place of origin.
Ecology: The species grows along the side of the stream in the down part of shady hilly slops in
association with Elatostema sessile Forst., Pilea anisophylla Wedd., Impatiens siculifer Hook.f., Pollia hasskarlii Rao Rolla, Polygonum chinensis Houtt., Begonia palmata D. Don, Commelina paludosa Blume, Steudnera colocasiaefolia C. Koch. etc.
R. Gogoi and S. Borah. 2013. Impatiens lohitensis, A New Species of Impatiens (Balsaminaceae) from Arunachal Pradesh, India. Taiwania, 58(1): 15–19.