Isodon excisus (Maxim.) Kudô

Herbs perennial. Stems numerous, erect, 60-100 cm tall, semiwoody basally, sparsely pubescent. Petiole 0.6-6 cm, sparsely pubescent; blade of lower leaves broadly cuneate to ± truncate and abruptly attenuate-decurrent, margin coarsely dentate-serrate, adaxially strigose-hispidulous, densely pubescent on veins, abaxially glabrous, yellow glandular, sparsely pubescent on veins; stem leaves opposite, orbicular or orbicular-ovate, (4-)6-13 × (3-)4-10 cm, base cuneate, margin entire or 1- to few serrate, apex excised, apical tooth 4-6 cm; lateral veins 3- or 4-paired, elevated. Panicles terminal or axillary, 6-15 cm; cymes (1-)3-5-flowered, pedunculate, densely pubescent; floral leaves bractlike, ovate, to 5 mm; bracteoles linear, ca. 1 mm. Pedicel 1-2 mm. Calyx campanulate, ca. 3 mm, pubescent outside, glandular, 2-lipped to 2/3 its length; lower lip slightly longer than upper lip, to 1.8 mm; teeth narrowly triangular, acute; fruiting calyx slightly dilated, ca. 4 mm, obscurely 2-lipped, teeth subequal. Corolla purplish, purple, or blue, to 9 mm, puberulent outside, glandular, tube ca. 4 mm. Stamens and style included or slightly exserted. Nutlets brown, obovoid, ca. 1.5 mm, hairy, glandular. Fl. Jul-Aug, fr. Aug-Sep.

Hebei, Heilongjiang, Jilin, Liaoning, Shanxi [Japan, Korea, Russia].

Grasslands, forest margins, forests; 500-1100 m.

Plectranthus excisus Maximowicz, Prim. Fl. Amur. 213. 1859; Amethystanthus excisus (Maximowicz) Nakai; Rabdosia excisa (Maximowicz) H. Hara.

Isodon excisus là một loài thực vật có hoa trong họ Hoa môi. Loài này được (Maxim.) Kudô mô tả khoa học đầu tiên năm 1929.