14 TROPICAL HAMMOCKS SCALE 0 10 20 30 40 S0 MILES rt - - Atlantic Gulf Ocean Mexico Tropical Hammocks occur in Plant Hardness Zone 10b. Oh' Map prepared by U. S. Department of Commerce, Bureau of The Census, 1960, Corrected as of April 1965. U. S. DEPARTMENT OF AGRICULTURE. SOIL CONSERVATION SERVICE USDA -SCS-FORT WORTH, TEXAS 1961 FEBRUARY 1981 4-R-36720-14 FEBRUARY 1968 BASE 4-L-25770