Japan Flora: Erect perennial herb; stems 20-40 cm. long, leafy toward base; leaves long-petiolate, glabrous; leaflets 3-5, the terminal ones membranous, oblong or ovate-oblong, 3-3.5 cm. long, obtuse, rounded to shallowly cordate at base, crenate-toothed, the peti- olules 3-5 mm. long, the lateral leaflets much smaller, 1-2 cm. long; spikes 5-15 cm. long, thinly pubescent, the lower verticils loosely arranged, the upper ones dense, 4- to 6-flowered> the floral bracts small; calyx tubular, 8-10 mm. long, bilabiate, sparingly glandular-pilose; corolla 1 cm. long, deep blue, the tube slightly longer than the calyx, the limb spreading; stamens long-exserted.

Honshu (Tajima and Tango Prov.). 

var. prostrata Satake. Stems prostrate, sparingly leafy on lower parts.  Honshu (Echizcn and Wakasa Prov.).