leadplant(n = noun.plant) amorpha canescens, lead plant - shrub of sandy woodlands and stream banks of western United States having hoary pinnate flowers and dull-colored racemose flowers; thought to indicate the presence of lead ore;
A shrub (Amorpha canescens) of sandy woodlands and streambanks of the Western U. S. having hoary pinnate flowers and dull-colored racemose flowers; it is thought to indicate the presence of lead ore. [WordNet 1.5]