Japan Flora: Sparingly crisped-pilose; rhizomes short; stems erect，8-15 cm. long, rather slender, with 2 or 3 pairs of scales at the base; leaves 3 or 4 pairs; the median ones oblong to broadly ovate, 2-4 cm. long, 1-2 cm. wide, obtuse, cuneate to abruptly nar­rowed at base, coarsely and obtusely few-toothed, green and often purplish along the nerves above, pale purplish beneath, the petioles winged, 1-2 cm. long, the upper leaves rather small and short-petiolate; verticils rather loose, few-flowered; upper lip of corolla erect, 2.5-3 mm. long, deeply 2-lobed, the lower lip 1/3-1/2 as long as the tube, the lateral lobes broadly lanceo­late, slightly narrower than the median; nutlets 1.2-1.5 mm. long.    Apr.-May.

Hokkaido, Honshu, Shikoku; rather common.

var. tsukubana Nakai. Tsukuba-kimmon-so. Upper lip semirounded, subentire, much shorter than the lower lip, about 1 mm. long.   Honshu, Kyushu.