Bui. 31, U. S. Dept. of Agriculture. 



Plate VII 



Fig. 1.— Opuntia puberula, Showing Proliferation in Fruit Caused by Attacks 



of Plant Lice. 



Fig. 2.— Opuntia leucotricha, Showing Its Habit when Grown from Cuttings. 



In the foreground is a small seedling of another species. The large plant only approaches the 

 tree form, although it has been trimmed to a considerable extent. 



OPUNTIA PUBERULA AND OPUNTIA LEUCOTRICHA. 



