Japan Flora: Peren­nial; stems 40-80 cm. long, erect, usually with long spreading hairs on nodes; leaves once or twice pinnate or ternate, long- petiolate, the leaflets narrowly ovate to broadly so, the terminal ones slightly larger, 2-7 cm. long, the bipinnate ones 1-2.5 cm. long; spikes terminal, 10-25 cm. long, often branched at base, with long spreading hairs; corolla deep purple, about 1 cm. long, long-pubescent externally; nutlets 1.5-2 mm. long. July-Aug.

Honshu (centr. and w. distr.).

var. lutescens. Flowers pale yellow. Honshu (Suzuka mts. in e. Kinki Distr.).

var. stolonifera G. Nakai. Resembles var. intermedia but stolons developed after anthesis. Hon­shu (Tokaido, from Izu Prov. to Mikawa Prov.).

var. crenata (Makino) Murata. Mountain phase with pale purple flowers, and the anther connectives usually gla­brous. Honshu (centr. and n. distr.)