Aconitum volubile Pallas ex Koelle var. latisectum Regel.

Caudex obconical, to 3.5 cm, to 1.2 cm in diam. Stem twining, rarely proximally suberect, branched, sparsely retrorse pubescent. Middle cauline leaves long petiolate; petiole 3.5--5.5 cm, sparsely pubescent; leaf blade ovate-pentagonal, 7--10 × 8--11 cm, abaxially glabrous, adaxially sparsely appressed pubescent, base cordate, 3-sect; segments shortly or long stipitate; central segment rhombic or rhombic-ovate, apex acuminate, below middle 3-fid; lateral segments obliquely flabellate, unequally 2-parted. Inflorescence terminal or axillary, several flowered; rachis and pedicels densely spreading pubescent; bracts linear, small. Pedicels decurved, 1.5--2.5 cm, with 2 bracteoles near middle; bracteoles subulate, 1.5--2 mm. Sepals blue, abaxially densely pubescent; lower sepals 0.7--1 cm; lateral sepals 1.2--1.4 cm; upper sepal high galeate, 1.6--1.9 cm high, lower margin 1.4--1.6 cm, slightly concave. Petals glabrous; limb ca. 9 mm; lip ca. 5 mm; spur incurved or subcircinate, ca. 2 mm. Stamens glabrous or sparsely pubescent. Follicles erect, ca. 2 cm. Seeds ca. 3 mm. Fl. Aug--Sep.

Grassy slopes, forests; 300--1900 m. Heilongjiang, Jilin, Liaoning [Russia (Far East)].