湿地黄耆 shi di huang qi

Astragalus nertschinskensis Freyn.

Plants (25-)45-90 cm tall. Stems usually several, erect, 30-70 cm, rather sparsely hairy; hairs medifixed, appressed, white, at nodes also black, 0.3-0.4 mm. Leaves 10-20 cm; stip­ules 6-10 mm, connate behind stem, rather densely white hairy; petiole 1.5-4 cm, with rachis sparsely to loosely hairy like stem; leaflets in 10-13 pairs, narrowly elliptic, 20-40 × 5-15 mm, abaxially loosely appressed white hairy, adaxially gla­brous, apex obtuse or minutely mucronulate. Racemes 3-6 cm, many flowered; peduncle 3-10 cm, loosely to rather densely covered with symmetrically to mostly asymmetrically bifurcate hairs up to 0.8 mm; bracts 5-6 mm, sparsely black ciliate. Ca­lyx 8-9 mm, loosely covered with medifixed, short, appressed, mostly black hairs; teeth 1.5-3 mm. Petals pale greenish yellow, keel violet tipped; standard elliptic, 14-18 × 5-6 mm, apex emarginate; wings 10-14 mm; keel 9-12 mm. Legumes sessile, obliquely erect, 9-13 mm, 3.5-4 mm high and 4-5 mm wide, 2-locular; valves thinly leathery, glabrous.

Mesophytic meadows, riversides, margins of coniferous forests. Heilongjiang, Jilin, Liaoning, Nei Mongol [Kazakhstan, N Korea, Mon­golia, Russia (Far East, Siberia)].