Botanical Survey of India | Flora of India

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Viola hookeri Thomson in Fl. Brit. India 1: 183. 1872, pro max. parte, emend. W. Becker in Beih. Bot. Centralbl. Abt. 2, 34: 159. 1916.


Herbs, perennial, glabrous or younger parts pilose; root-stock warted; stems and stolons short. Leaves broadly ovate-orbicular, rounded at apex, rarely subacute, broadly crenate, 1.5 - 4 x 1.5 - 3.5 cm, basal sinus deep; lobes touching or overlapping, glabrous; petioles up to 10 cm long, not winged; stipules lanceolate, acuminate, up to 1.2 cm long, toothed or lacerate, glandular at tip. Peduncles up to 7 cm long. Flowers ca 1 cm across, white with purple veins. Sepals lanceolate, obtuse, ca 5 mm long. Petals oblong-ovate, ca 1 cm long, minutely puberulous. Style subclavate, narrowed downwards from the obscurely beaked stigma. Capsules ca 5 mm long; valves apiculate, glandular.

Fl. April- June; Fr. July - Aug.

Distrib. India: Moist places in shaded places of forests, 2000 - 3000 m. West Bengal, Sikkim and Arunachal Pradesh.

Nepal, Bhutan and China.

Notes. Chromosome number reported: n = 9 (Sharma & Sarkar in Research Bulletin 2: 39. 1967-68); n = 9,36 (Chatterjee & Sharma in J. Genet. 61: 52 - 63. 1973).

Thomson described V. hookeri based on two collections: (i) from Bhutan by Griffith and (ii) from Sikkim by J.D. Hooker, as mentioned in the protologue, although he was not unaware of there being two species mixed up and if so they occur in both Sikkim and Bhutan collections. The one with ovate-rotundate, deeply cordate or with overlapping basal auricles, rounded, crenate, glabrous, obtuse, silvery-grey beneath and minutely gland-dotted leaves and acute sepals has been described as V. sikkimensis by W. Becker (1916).




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