Plate I. 



Fig-. 1. General view of the sand-dunes near Havana. Tlie isolated trees are ^iicrcu^ i,:lu- 

 tina ; at the right is a grove of J.:glaus nigra. 



Fig. 2. Lcptoloma cogiiatiim consocies of the btmch-trrass association, Oquawka area Large 

 bunches of Andropogon scoparius in the rear, and a flowering Achillea Millefolium in the center. 



