Harper : Collection of Plants in Georgia 457 



On the following morning we collected in and near Lafayette, 



and in the afternoon went to the railroad tunnel at the north end 



of Pigeon Mountain and found a number of interesting plants 



on the Chattanooga Black Shale and Mountain Limestone in that 

 vicinity. 



On the morning of the third we visited Bluebird Gap, on the 

 mountain, about midway between the points visited on the two 

 preceding days. The same afternoon we returned to Dalton by 

 rail, by way of Chattanooga, Tenn. 



We would gladly have remained longer in this interesting 

 region, but as we could not bring our driers over the mountains 

 with us, our stay was limited. During our Lafayette trip Mr. 



Wilso 



210, and I numbers 324-365. 



On August 5 Mr. Wilson 



while I remained in Dalton ten days longer, collecting plants 

 numbered 366 to 401 in the vicinity. 



From Dalton I journeyed about 250 miles southward, and the 

 afternoon of the 16th found me at Leslie, a small town of about 



200 



five weeks at the home of the mayor, an old friend of mine. From 

 Leslie I made three trips to Americus, 12 miles northwest, on 

 August 20, 27-29, and September 15, and two to the Flint River, 

 9 miles east, on September 3 and 10. The rest of the time I col- 

 lected within two or three miles of Leslie. Fig. 2 is a typical 

 scene in the pine barrens near Leslie, in which I did most of mv 

 collecting in that region. 



The geological formations in Sumter county are Lower and 

 Middle Eocene (Tertiary), with several subdivisions, overlaid by two 

 recent formations, the Lafayette and the Columbia. The Lafay- 

 ette (named for its type-locality, Lafayette county, Mississippi), 

 which is a mixture of sand and clay in varying proportions, averag- 

 ing many feet in thickness, covers nearly the whole county. In the 

 vicinity of the Flint River this has been removed by erosion and 

 replaced by the Columbia (named for the District of Columbia), a 

 newer and much thinner deposit of almost pure sand. In the 

 southeastern part of the county the Columbia formation extends 

 back from the river about three miles, and seems to overlap 'the 

 Lafayette slightly, as I have been led to infer from the character 



