Aconitum longecassidatum Nakai

Rhizome unknown. Stem ca. 65 cm tall, apically shortly branched, retrorse yellowish pubescent. Basal leaves unknown; cauline leaves ca. 6, proximal ones long petiolate, distal ones shortly petiolate; petiole 5--20 cm; leaf blade pentagonal-reniform, ca. 7 × 12 cm, both surfaces yellowish pubescent, 3-fid beyond middle; central lobe obtrapezoid-rhombic, below middle 3-lobed; lateral lobes obliquely flabellate, unequally 2-fid ± to middle. Inflorescence ca. 10 cm, 6- or 7-flowered, rachis and pedicels densely retrorse and appressed yellow pubescent, bracts ovate or narrowly ovate, 0.9--1.4 cm. Pedicels 7--10 mm, with 2 bracteoles at middle; bracteoles spatulate-linear, 6--7.5 mm. Sepals purple, abaxially densely yellowish pubescent; lower sepals ca. 1.1 cm; lateral sepals ca. 1 cm; upper sepal cylindric, ca. 2.2 cm high, middle ca. 4.5 mm in diam., apex rounded, shortly beaked, lower margin ca. 1.2 cm. Petals glabrous; lip linear, conspicuous; spur curved, ca. 2.5 × as long as lip. Stamens glabrous; filaments entire or 2-denticulate. Carpels 3; ovary glabrous. Fl. Sep.

Mountains. S Liaoning, E Shandong (Qingdao) [Korea].

Aconitum longecassidatum là một loài thực vật có hoa trong họ Mao lương. Loài này được Nakai mô tả khoa học đầu tiên năm 1909.

高帽乌头（学名：Aconitum longecassidatum）为毛茛科乌头属下的一个种。