Aconitum nagarum Stapf in Ann. R. Bot. Gard. Calc. 10: 176. 1905.

Herbs, biennial; rools paired, tuberous; stems erect, up to 1 m high, simple. Basal leaves soon withering, upper scattered and few; lowest petioles up to 60 cm long; lamina cordate-reniform, 3-partite to the base, glabrous. Inflorescence a slender raceme, greyish pubescent. Sepals blue. Petals and filaments glabrous. Carpels 5, pubescent. Follicles oblong, divergent towards the apex; seeds transversely lamellate.

Fl. & Fr. Apr. - May.

Distrib. India: Arunachal Pradesh, Nagaland and Manipur.

Myanmar.