407. ERYNGIUM AQUATICUM Linné.—WATER ERYNGO. RATTLESNAKE'S MASTER. Habitat: United States. (Root.) Diaphoretic and expectorant, and has been used as a substitute for senega. Dose of fluidextract: 20 to 40 drops (1.3 to 2.6 mils).

A Manual of Organic Materia Medica and Pharmacognosy, 1917, was written by Lucius E. Sayre, B.S. Ph. M.