Description from Flora of China
Lycopus virginicus Linnaeus var. parviflorus (Maximowicz) Makino.
Rhizomes fusiform, producing filiform stolons with scalelike leaves. Stems erect, 25-40 cm, usually unbranched, densely fine puberulent. Leaves short petiolate, oblong-elliptic, mid stem leaves largest, others 3-5.5 × 1.2-2.5 cm, subglabrous or veins sparsely fine puberulent, sparsely yellowish glandular, base cuneate-attenuate, margin ± 4-6-serrate or entire. Verticillasters 7-10-flowered, not distinctly globose, subtended by 2 or 3 bracteoles; bracteoles linear-lanceolate, ca. 1 mm, ciliate. Calyx ca. 2 mm, pubescent; teeth 5, ovate, ca. 0.8 mm, apex acute, ciliolate, 1 tooth slightly smaller. Corolla white, ca. 2 mm, pubescent, tube ca. 1 mm; limb obscurely 2-lipped, upper lip straight, lower lip spreading. Stamens slightly longer than corolla. Nutlets unknown. Fl. Jul.
* Wet grasslands; ca. 600 m. Heilongjiang, Jilin.