464 Harper : Collection of Plants in Georgia 



I have seen no other specimens from the state besides my own, the 

 others all being from farther west. It does not seem to be generally 

 known that the stems of this species are often, if not usually, de- 

 cumbent at the base and root from the lower nodes. 



Cenchrus macrocephalus (Doell) Scribn. Bull. U. S. Dept. 



Agric, Div. Agrost. 17: no./. 406. 1899 



I found this species very abundant on the summits of the 

 drifting sand dunes of Tybee Island (no. 744). 



Cenchrus incertus M. A. Curtis 



Collected in dry sandy soil on the banks of Gum Creek (near 

 the Flint River) in Dooly county, September 3 (no. 570). All the 

 specimens of this species which I have seen seem to be from the 

 Columbia formation. 



Aristida spiciformis Ell. 



Collected in flat pine barrens near Douglas in Coffee county, 

 September 22 (no 686), where it was accompanied by Poly gala 

 nana, Kalmia hirsuta (no. 687), A/zelia cassioides (no. 688), and 

 Gratiola hispida (no. 689). Also seen in Ware county, September 

 28. In the living state this grass bears a striking resemblance to 



Hordeum htbatiun. on account of it-a Inner Qtraicrlit crowded awns. 



Aristida palustris (Chapm.) Vasey, Contr. U. S. Nat. Herb. 3: 



45. 1892 



Collected in a pine-barren pond in Sumter county, September 

 12 (no. 644), and in wet pine barrens near Douglas, September 22 

 (no. 690). Previously known only from Florida and near the Gulf 



coast. 



Sporobolus Floridanus Chapm. 



Collected in moist pine barrens, Sumter county, August 3 1 (no. 

 547) and September 8 (no. 611). Not definitely known outside 

 of Florida before. The leaves of this species are unusually stiff and 

 strong, being of about the same texture as those of Sabal glabra or 



Serenoa serrulata. When 



ticed 



that the leaves did not break like those of other grasses when 

 doubled, and after my return I made some tests of their strength. 



