Impatiens mishmiensis Hook. f., Fl. Brit. India 1: 476.1875 & in Rec. Bot. Surv. India 4: 12. 1905.

Herbs, ca 1.5 m high; stems stout, branched. Leaves crowded together at top of stem, generally 10 or more, elliptic to elliptic-oblanceolate, rarely narrowly obovate, cuneate into petiole at base, acuminate at apex, crenate-dentate along margins with ca 1 mm long filiform appendages on basal crenations, ca 17.5 x 5 cm, pubescent beneath on midnerve, deep green above, pale green beneath; lateral nerves 9 - 16 pairs; petiole 2.8 - 6 cm long; stipular glands absent. Peduncles less than 15 cm, stout. Flowers few, in broken whorls, on short axillary umbels, 2 - 3.5 cm across, white; bracts large,ca 8 mm long, whorled, persistent. Lateral sepals broadly ovate, acuminate, ca 8 x 7 mm, flesh-coloured. Lip bucciniform, 1.5 - 1.8 x 1.3 - 1.5 cm; spur abruptly constricted, filiform, curved, 1.4 - 2.5 cm long. Standard obcordate to suborbicular, obtusely spurred on back, flesh coloured. Wings clawed and bilobed; basal lobes elliptic-oblong; distal lobes semielliptic, entire, tinged yellow and with two yellow spots; dorsal auricle short, curved. Capsules linear, acute, 1.9 - 2.2 cm long.

Fl. & Fr. Aug.

Distrib. India. E. Himalayas. Assam and Arunachal Pradesh.

Endemic.