PLATE 5 
A. —Creosote bush and bur-sage. An open stand of good Covillea ghUinosa 
(Engelm.) Rydb. with many plants of Franseria dumosa A. Gray occurring in the 
interspaces. The Covillea with its dark green lacquered leaves appears almost 
black, and contrasts sharply with Franseria which is silvery in color and, at a 
distance, appears almost pure white. Palm Springs, Calif., March 7, 1915. 
B. —-An open stand of creosote bush with desert-sage. The contrast in color 
of the two plants is very sharp. Covillea glutinosa (Engelm.) Rydb. is very dark 
Breen and Atriplex polycarpa (Torr.) S. Wats, an ashy gray. Death Valley 
Junction, Calif., September 15, 1915. 
