PLATE XXI 



Tree Yucca, Yucca (Cleistoi/ucca) arbores- 

 cens, Characteristic of Certain Levels on the 

 Mohave Desert. Often Eeferred to as a 

 Palm or even as a Cactus-Palm, It is Some- 

 what Surprising to Find That This Tree, 

 Reaching a Height of Twenty-five Feet, Is 

 Botanically a Member of the Lily Family. 

 The Desert Wood-rat (Neotoma desertornm) 

 Feeds on the Young Leaves and the Fruit. 

 In Early Times the Indians of the Mohave 

 Desert Pounded the Small, Dry, Black Seeds 

 Into a Meal for Food. 

 Photograph by Harley P. Chandler. 



