Bot. [f. Gr. ἄμορφ-ος shapeless.] A genus of N. American deciduous shrubs, with long spiked clusters of purple flowers.
1753. Chambers, Cycl. Supp., Amorpha … a genus of plants of the papilionaceous kind.
1847. Longf., Evang., II. iv. 13. Prairies … Bright with … purple amorphas.
1866. Johns, in Treas. Bot., 53. The two pairs of petals, termed severally the wings and keel, are absent, the only representative of petals being the standard or vexillum, and hence its name Amorpha, ‘deformed.’
