Ragweed. Roman Wormwood. Hogweed. (America.) N. O. Compositæ. Tincture of fresh flower heads and young shoots.
Clinical.─Coryza. Hay-fever.
Characteristics.─Dr. E. T. Marsh and another experimenter suffered severely from symptoms of coryza and hay-fever whilst observing the pollen of this plant. It should therefore be of service in similar affections.