white-flowered West Indian plant whose root yields arrowroot starch

white-flowered West Indian plant whose root yields arrowroot starch

perennial marsh plant having swordlike leaves and aromatic roots

perennial marsh plant having swordlike leaves and aromatic roots

perennial marsh plant having swordlike leaves and aromatic roots

perennial marsh plant having swordlike leaves and aromatic roots

perennial marsh plant having swordlike leaves and aromatic roots

perennial marsh plant having swordlike leaves and aromatic roots

perennial marsh plant having swordlike leaves and aromatic roots

a poisonous herb native to northern Europe having hooded blue-purple flowers; the dried leaves and roots yield aconite