Botanical Survey of India | Flora of India

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Impatiens serrata Benth. ex Hook. f. & Thomson in J. Linn. Soc., Bot. 4: 136. 1860; H. Hara in Fl. E. Himal. 3: 79. 1975. I. serrata Hook. f. in Rec. Bot. Surv. India 4: 7.1904.

Herbs, 30 - 90 cm high, glabrous; stems simple or sparingly branched. Leaves alternate, ovate to ovate-lanceolate, gradually attenuate at base,acute to long-acuminate at apex, serrate to serrulate along margins, serration with fine appendages, lower teeth become filiform appendages, 2 - 11.2 x 2 - 3.5 cm, finely pubescent or glabrous; lateral nerves 4 - 9 pairs; petiole 0.3 - 3 cm long, glabrous. Flowers one or two, peduncled, 1.5 - 3.2 cm yellow or white with red spots; bracts setaceous. Lateral sepals ovate or elliptic-lanceolate, acuminate, ca 4 x 25 mm, red-spotted, puberulous. Lip navicular, 9 - 5 x 0.3 cm, red-spotted, not spurred. Standard suborbicular, shortly acutely pointed at apex, red-spotted. Wings bilobed, narrow, acutely pointed at apex; basal lobes large, rounded; distal lobes oblong. Capsules linear, acute, 0.7 - 4.2 cm long; seeds glabrous.

Fl. Aug. - Oct.

Distrib. India: W. Himalayas, 2430 - 3040 m. Himachal Pradesh and Uttar Pradesh.

Nepal and Bhutan.

Notes. H. Hara (l.c.) treated I. serrulata Hook. f. as a synonym under this species. I. serrata sensu Hook. f. has been split into two species-I. falcifer and I. serratifolia by J.D. Hooker (Rec. Bot. Surv. India 4: 23. 1905).

Chromosome no. 2n = 14 (Khoshoo, T.N. in Proc. Indian Acad. Sci. sect. B. 63: 35 - 48. 1966).

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