Frost-tender, small, spreading, often weeping, deciduous tree with spiny green stems, slender, 2-pinnate leaves with many tiny leaflets which fold up at night, and racemes of 2-15 cup-shaped, sweetly scented bright yellow flowers with orange markings and stamens, to 2cm across, in spring.  To 10m.  In dry, frost-free areas it is suitable for hedging and screening, its light, open structure allowing turf and other plants to thrive in its shade.  [RHSE, Hortus].