Botanical Survey of India | Flora of India

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Impatiens arguta Hook. f. & Thomson in J. Linn. Soc., Bot. 4: 137. 1860; Hook. f., Fl. Brit. India 1: 470. 1875 & in Rec. Bot. Surv. India 4: 17. 1905; Biswas, Pl. Darj. Sikkim Himal. 1: 207. 1966; H. Hara in Fl. Pl. E. Himal. 1: 194. 1966, 2: 74. 1971 & 3: 78. 1975; H. Hara in H. Hara & Williams, Enum. Fl. Pl. Nepal 2: 78.1979; Akiyama et al. in Bull. Natn. Sci. Mus. ser. B. 21(4): 151 - 168. 1995. I. gagei Hook. f. in Hooker's,Icon. Pl. ser. 4. 10:t. 2951. 1913.


Asm.: Dhumdhakuva.

Herbs, annual, at times much branched, erect, more or less glabrous. Leaves alternate, ovate or lanceolate, cuneate at base, acuminate at apex, sharply serrate along margins, often ciliate at base, 6 - 12 x 3 - 5 cm; petiole ca 3 cm long, usually glandular; stipules absent. Flowers axillary, 1 - 2-flowered, pedicellate, 2 - 4 cm long, pale lilac; bracts setaceous, twisted; bracteoles subulate, twisted; pedicels up to 4 cm long. Lateral sepals 4, outer dimidiate-ovate, oblique, cuspidate-acuminate, 5 - 9 x 2 - 5 mm. Lip elongate, bucciniform; spur short, stout, yellowish. Standard obovate with a red spot, spurred dorsally. Wings bilobed, long, pendulous, ca 2.5 cm long. Stamens 5, petaloid, glabrous. Capsules narrow, stout. linear, 1 - 4 x 0.2 - 0.5 cm; seeds glabrous.

Fl. & Fr. July - Oct.

Distrib. India: E. Himalayas, ca 910 - 2130 m. W. Bengal, Sikkim, Assam, Arunachal Pradesh, Nagaland, Manipur and Meghalaya.

Nepal, Bhutan, Tibet, Myanmar and China.

Chromosome no. 2n = 12,18 (Chatterjee, A. & A.K. Sharma in Nucleus 13: 179 - 200. 1970).




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