The stems are four-sided, naked or pubescent, strongly branching at the top, up to 80 cm in height, can be straight, bushy or lying.
Rhizome powerful, thick, deep-lying.
Leaves on the internode Leaves 1-2 cm long and 0.3-1 cm wide, oblong -obovata, whole.
flower stalks are axillary, longer than the leaves. The brush is head, bushy dense, multiflorous, 2-3 cm long. The flowers are blue-purple. Calyx 0.5-0.6 cm long tubular – funnel, hairy.
Fruit – bean, about 0.6 cm across.
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