Impatiens amplexicaulis Edgew. in Trans. Linn. Soc. London 20: 37.1846; Hook. f., Fl. Brit. India 1: 469. 1875 & in Rec. Bot. Surv. India 4: 5.1904; H. Hara in Fl. E. Himal. 3: 78.1975; H. Hara in H. Hara & Williams, Enum. Fl. Pl. Nepal 2: 78. 1979; Akiyama et al. in Bull. Natn. Sci. Mus. sere B. 21(4): 151 - 168. 1995.

Herbs, annual; stems branched. Leaves sessile, opposite or alternate, ovate-lanceolate, acuminate at apex, base more or less rounded and amplexicaulous or attenuate into stem; dentate along margins, 4 - 5 x 1 - 2 cm; lateral nerves 7 - 17 pairs. Flowers 1.6 - 2.3 cm long; bracts at base of pedicels, lanceolate, 2 mm long; pedicel thickened at top, often bending. Lateral sepals ovate, acuminate, 3 - 5 mm long. Lip shallowly and rather obliquely navicular, 0.9 - 1.1 cm long, spurred; spur abruptly constricted, filiform, 0.5 - 0.9 cm long. Standard cucullate, bilobed, 0.6 - 0.8 cm long. Wings bilobed, 1.2 - 1.8 cm long; basal lobes ovate, entire, 5 - 8 x 3 - 5 mm; distal lobes oblanceolate, 7 - 11 x 3 - 5 mm. Capsules linear to clavate, acute, 0.5 - 1.8 cm.

Fl. & Fr. June - Aug.

Distrib. India: W. & E. Himalayas, ca 2120 - 2430 m. Himachal Pradesh, Punjab, Uttar Pradesh and Arunachal Pradesh.

Nepal, Tibet and China (Yunnan).

Chromosome no. 2n = 20 (Khoshoo, T.N. in Curr. Sci. 24: 423 - 424. 1955).

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