MOSAIC MILKWEED LEAVES AND PLANTS 
A. Mosaic milkweed plant, Asclepias syriaca, found in cucumber plats at Madison, Wis. f 
lowing slight mottling and deformation of the leaves. Inoculations from this plant produced 
losaic on healthy cucumber plants. Madison, Wis., August, 1922 
B. Mosaic milkweed plant inoculated by means of aphids from a mosaic cucumber plant, 
lowing extreme type of mosaic symptoms. Madison, Wis., August, 1920 
C. Mosaic milkweed plants (at right) grown in greenhouse from roots of mosaic plant shown 
i B. Healthy plant (at left) grown from roots of healthy plant collected in the field 
ladison, Wis., February, 1920. 
D. Young leaf of healthy milkweed plant 
E. F. Young leaves of mosaic milkweed collected at Rockland, Wis., July, 1922 
