淡紫荆芥 dan zi jing jie

Plants suffrutescent, with cylindric roots and numerous stems. Stems to 30 cm, finely pilose. Petiole 4.5-5.5 cm basally, gradually shorter to almost absent upward, flat, sparsely short lanate; leaf blade broadly ovate to ovate-cordate, 1-2.5 × 1-2.5 cm, bullate, sparsely short lanate, base cordate, margin irregularly crenate, apex rounded to obtuse. Verticillasters remote, pedunculate basally, many flowered and subsessile upward; bracts lanceolate, margin entire, apex mucronate, purple lanate; bracteoles purple lanate. Calyx purple lanate outside; teeth lanceolate, subulate, those of upper lip almost divaricate, teeth of lower lip projected and slightly longer. Corolla blue-purple, ca. 1.2 mm, tube slightly exserted. Fl. Jun-Jul.

* Gravelly slopes, deserts near lakes; 4200-4300 m. Xizang.