what does lead plant mean?

LEAD PLANT as NOUN

Meaning
- 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
Synonym(s)
- Amorpha canescens (what does Amorpha canescens mean?)
- leadplant (what does leadplant mean?)
Hypernyms(s) lead plant is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- amorpha (what does amorpha mean?)