1) Bush 2) Shrub 3) Type of shrub 1) Leadplant 
[moth] Amorpha is a genus of moths in the Sphingidae family. ...
• (n.) A genus of leguminous shrubs, having long clusters of purple flowers; false or bastard indigo.
(False Indigo, Lead Plant) These hardy, deciduous shrubs are natives of North America and Mexico. They have feathery-looking, pinnate leaves and dense spikes of small, pea-like flowers that are ordinarily blue or violet. The flowers are borne at the ends of the shoots in July or August. A. fruticosa (False Indigo) is a medium-sized to large shrub w...
A·mor'pha noun ; plural Amorphas [ Greek ... shapeless.] (Botany) A genus of leguminous shrubs, having long clusters of purple flowers; false or bastard indigo. Longfellow. 
[n] - any plant of the genus Amorpha having odd-pinnate leaves and purplish spicate flowers
noun any plant of the genus Amorpha having odd-pinnate leaves and purplish spicate flowers