ALTAMAHA GRIT REGION OF GEORGIA 297 



Virginia to Florida and Texas, mostly in the coastal plain. 



P. Combsii Scribn. & Ball, Bull. Div. Agrost. U. S. Dept. Agr. 



29: 42. /. 16. 1900. 

 coffee: Moist pine-barrens near Douglas, Sept 2.2, 1903 



(2014). berrien: Shallow pond near Tifton, Sept. 26, 



1902 (i6jq). 

 Krown otherwise only from West Florida. 



P„ virgatum L., Sp. PL 59. 1753. 



worth: Low grounds east of Tyty, with P. hemitomon, 

 Sept. 30, 1902. Scattered over South Georgia, in dry or 

 wet places, but natural habitat uncertain. 



Widely distributed in the Eastern United States. 



P. COGNATUM Schult. 



irwin: In Lafayette soil along railroad cuts, Cycloneta and 

 southward, Oct. 2, 1902, beginning to flower (1702). Also 

 in the Eocene region. Becomes a tumbleweed in late fall. 



Said to range from South Carolina to Minnesota and Arizona, 

 but natural range and habitat unknown. 



P. verrucosum MuhL, Gram. 113. 18 17. 



P. debile Ell., Sk. 1 : 129. 1816. (Not of Desf., 1800.) 

 Moist pine-barrens, branch-swamps, etc. ; not common, irwin, 

 berrien, worth, colquitt. Fl. September. Also in Sum- 

 ter County. 

 Massachusetts to central Florida and Louisiana, in the coastal 

 plain. 



P. stenodes Griseb., Fl. Brit. W. I. 547. 1864. 



P. anceps strictum Chapm., Fl. 573. i860. Not P. strtctum 



R. Br. 

 Margins of ponds, particularly cypress and sand-hill ponds; 



not common, coffee, colquitt. Fl. summer. Inland to 



Sumter and Early Counties and coastward to Ware and 



Charlton. 

 South to South Florida and west to Texas, in the pine-barrens. 



Also reported from the West Indies and South America, 



but it is not certain that our plant is identical with the 



tropical one. 



