Impatiens annulifer Hook. f. in Rec. Bot. Surv. India 4: 27. 1905.

Herbs, annual, erect, ca 30 cm high; stems much branched. Leaves alternate, crowded together at top of stem, elliptic to elliptic-oblanceolate, rarely ovate, attenuate or cuneate at base,acute to acuminate at apex, shallowly crenate or crenate-serrate along margins, crenations with appendages, 3.5 - 10.5 x 1.8 - 4.7 cm, deep green above, pale green beneath; petiole 0.9 - 2.7 cm long; stipular glands absent. Inflorescence a raceme, subterminal, 1 - 2-flowered; peduncles slender, 2.5 - 3.5 cm long. Flowers yellow; bracts ovate. Lateral sepals orbicular or broadly ovate, acute, 6 - 8 mm long, glabrous. Lip bucciniform, 1.7 - 2.3 cm long, 1.5 - 2 cm deep, abruptly constricted into spur; spur annular, 1.8 - 2 cm long. Standard cucullate, 1.5 cm long, with an appendage. Wings 2.7 cm long; basal lobes ovate or more or less triangular; distal lobes orbicular; dorsal auricle present. Capsules acute, 1 cm long, turgid, glabrous.

Fl. & Fr. Aug. - Dec.

Distrib. India: E. Himalayas, 900 - 1700 m. Sikkim, Arunachal Pradesh, Nagaland and Manipur.

Endemic.