Botanical Survey of India | Flora of India

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Impatiens radiata Hook. f., Fl. Brit. India 1: 476. 1875 & in Rec. Bot. Surv. India 4: 15. 1905; Biswas, Pl. Darj. Sikkim Himal. 1: 210. 1966; H. Hara in Fl. E. Himal. 1: 196. 1966 & 2: 75. 1971 et H. Hara in H. Hara & Williams, Enum. Fl. Pl. Nepal 2: 80. 1979; Akiyama et al. in Bull. Natn. Sci. Mus. ser. B. 21(4): 151 - 168. 1995.


Herbs, glabrous, up to 1 m high, leaf-bases deep red with stalked glands, ca 1.5 mm long. Leaves ovate-elliptic to elliptic-oblong, attenuate into petiole at base, long-acuminate at apex, crenate along margins, with red filiform appendages on crenations; lateral nerves 9 - 12 pairs; petiole 2 - 10 cm long; stipular glands 2, large. Flowers ca 2.5 cm across, yellow or purplish; peduncles 8.5 - 11 cm long with 2 - 5 whorls of pedicels; bracts persistent, ovate with glandular tip, ca 1.5 cm long. Lateral sepals ovate, ca 3 x 1 mm long, with stout ca 1 mm long glandular points. Lip shallowly navicular, 3 - 5 mm long; spur abruptly constricted, filiform, straight with a swollen tip, 6 - 12 mm long, rosy. Standard ovate, ca 4 x 3 mm. Wings 9 - 12 mm long; basal lobes ovate-triangular, 2 - 3 x 1.5 - 2 mm; distal lobes narrowly ovate but narrowed just above middle, apiculate, 6 - 9 x 3 - 4 mm. Capsules 1.5 cm, glabrous.

Fl. & Fr. Sept. - Nov.

Distrib. India: E. Himalayas, ca 1500 - 3650 m. W. Bengal, Sikkim, Arunachal Pradesh and Meghalaya.

Nepal, Tibet, Bhutan, Myanmar and China (Yunnan).

Chromosome no. 2n = 20 (Sarkar, A.K. et al. in Proc. Indian Sci. Congo part. 3. 32 - 33. 1974).





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