Aconitum nakaoi Tamura in Acta Phytotax. & Geobot. Kyoto 19; 73. 1962. A. parabrachypodum Lauener in Notes R. Bot. Gard. Edinb. 25: 7. 1963.

Herbs, biennial; stems slender, up to 90 cm high, bending over, hairy above, naked at base. Stem leaves 5- to 7-partite, 3 - 10 cm in diam.; lobes oblong, acute; ultimate segments linear. Inflorescence a lax subpaniculate raceme, 10 - 15 cm long; branches bearing 2 - 3 flowers; flowers rich blue-violet or pale purple with a reddish tinge. Uppermost sepal ca 2 x 1 cm, beaked and hooded; upper lateral sepals suborbicular, ca 1.5 cm in diant.; lower sepals ovate, ca 13 x 5 mm. Petals hispid, somewhat T-shaped; head 7 - 8 mm; spur bulbous, recurved. Carpels 5, with long yellowish hairs.

Fl. & Fr. Aug. - Oct.

Distrib. India: Among Rhododendron scrubs on rocky alpine slopes, 3800 - 4400 m. Arunachal Pradesh.

Bhutan and W. China.