龙船草 long chuan cao

Dracocephalum cochinchinensis Loureiro, Fl. Cochinch. 2: 371. 1790; Anisochilus sinensis Hance; Geniosporum holocheilum Hance; Mesona prunnelloides Hemsley; Nosema holocheilum (Hance) Kudo; N. prunnelloides (Hemsley) C. B. Clarke ex Prain.

Herbs. Stems erect or suberect, 8-80 cm, densely appressed or ± patent villous. Petiole less than 1 cm; leaf blade oblong, elliptic to ovate-oblong, 1.5-7 × 0.8-2.5 cm, densely appressed villous, base rounded to cuneate, margin obscurely serrulate or crenulate to subentire, apex obtuse to acute. Verticillasters in dense, terminal, villous capitula or spikes 1-10(-18) cm; bracts sessile, broadly ovate or subrhombic-ovate, shorter than all but basal verticillasters. Calyx 3-3.5 mm in flower, to 6.5 mm in fruit, densely brownish lanate, upper lip broadly oblong. Corolla blue, purple, or reddish, villous, throat sparsely puberulent, tube dilated, lower lip narrow. Anterior stamens longer; filaments bearded. Nutlets dark brown, oblong, smooth. Fl. Oct-Feb.

Hills, valleys; 100-1000 m. Guangdong, Guangxi, Hainan [Indonesia, Thailand, Vietnam]

Used medicinally.