51 



young tree beyond the real fire danger. These factors without 

 question make P. carihaea better able than Pinus palustris to 

 withstand the combined attack of hogs and fire. 



In the close vicinity of Mandeville and Covington Pinus Taeda 

 appeared. From the latter town westward as far as Hammond, 

 Tangipahoa Parish, slash pine is confined rather to ponds and 

 along stream borders than spread over large areas of flatland as 

 happens farther east. About Hammond — half-way between the 



Fig. 2. The drying of ponds, due to the cutting and burning of the surround- 

 ing forest, has permitted Pinus caribaea to invade new territory extensively 

 throughout its range. St. Tammany Parish, west of the Pearl River watershed, 

 Louisiana. 



Pearl and the Mississippi rivers, and the most westerly point 

 visited by the writer — slash was noted as quite common in young 

 stands and scattered groups. 



Its vigorous growth at Hammond, apparently as rapid as in 

 any section previously visited, and its occurrence south of Ham- 

 mond along the Illinois Central right-of-way, suggests the high 

 probability that it occurs to the north and to the west doubt- 

 less as far as the natural barriers formed by the extensive 

 outlying swamp and overflow lands of the Mississippi River. 

 Locally the species was observed to maintain its long, clearL 



