Aconitum macrorhynchum Turcz. ex Ledeb.

Caudex carrot-shaped, 1.2--2.8 cm, 5--10 mm in diam. Stem 68--100 cm, basally nearly glabrous, apically sparsely retrorse pubescent, with leaves equally arranged along stem. Proximal cauline leaves withered at anthesis, and middle ones slightly long petiolate; petiole 5--10 cm; leaf blade orbicular-ovate, 5.5--10 × 6--12 cm, 3-sect; central segment triangular-ovate, subpinnatisect; ultimate lobes linear, 1--3 mm wide. Inflorescence terminal on stem and branches, 5--15-flowered; proximal bracts leaflike, distal ones linear. Pedicel 1.5--2.5 cm, with 2 bracteoles proximally or distally; bracteoles linear, (1.5--)2.5--4 mm. Sepals purple-blue, abaxially sparsely pubescent; lower sepals 0.9--1.1 cm; lateral sepals orbicular-obovate, 1.1--1.4 cm; upper sepal high galeate, 1.5--1.9 cm high, lower margin 1.3--1.7 cm. Petaline claw sparsely pubescent; limb glabrous; lip ca. 4.5 mm, slightly concave; spur incurved, ca. 1 mm. Stamens sparsely pubescent; filaments entire or 2-denticulate. Carpels 5(--8), pubescent. Follicles 1--1.3 cm. Seeds ca. 2.8 mm. Fl. Aug--Sep. 2n = 16*.

Heilongjiang, Jilin [Russia (Far East, E Siberia)].

Grasslands, slopes; 200--500 m.

Aconitum macrorhynchum f. tenuissimum (Nakai & Kitagawa) S. H. Li & Y. H. Huang; A. macrorhynchum var. octocarpum P. K. Chang & B. Y. Wang; A. macrorhynchum var. viviparum P. K. Chang. & B. Y. Wang; A. tenuissimum Nakai & Kitagawa.