Plate 31. Map Showing the Distribution

of the Genus Magnolia in the United States.
EXPLANATION.
Blue ------ Boundary line of Magnolia acuminata.
Blue ____ Boundary line of Magnolia Fraseri.
Blue ........ Northern boundary line of Magnolia grandiflora.
Red ......... Boundary line of Magnolia macrophylla.
Red _____ Boundary line of Magnolia Umbrella. Red ------- Boundary line of Magnolia glauca. Red Spot—Place where Magnolia cordata was originally discovered. This image is from Magnolia in the Drugs and Medicines of North America.

Plate 31. Map Showing the Distribution