88 TRANSACTIONS OF THE [ FEB, 22, 
*** Bristles retrorsely barbed. 
29. Rynchospora alba (L.). 
Schenus albus, L. Sp. Pl., i, 65 (1753). 
Rynchospora alba, Vahl, Enum., ii, 236 (1806). 
Newfoundland to Alaska, south to Virginia, Florida, Pennsyl- 
vania, Minnesota, and Oregon. [Europe and Asia. ] 
Var. macra, Clarke. 
Clusters larger, sometimes 3 cm. broad; bristles more numerous, 15-20. 
Florida (Chapman); Texas (Drummond, 281). 
30. Rynchospora capillacea, Torr. 
Schenus setaceus, Muhl, Gram., 6 (1817), not Berg. nor R. setacea, Vahl. 
Riynchospora capillacea, Torr., Fl. N. and Mid. States, 41 (1826). 
Vermont and Ontario to Minnesota, south to New Jersey, Penn- 
sylvania, and Michigan. 
Var. leviseta, E. J. Hill. 
R. capillacea, var. leviseta, E. J. Hill, Amer. Nat., x. 370 (1876). 
Lake County, Indiana. 
31. Rynchospora Knieskernii, Carey. 
Rynchospora Knieskernit, Carey, Am. Journ. Sci. (II), iv, 25 (1847). 
Pine barrens, New Jersey to Virginia. 
32. Rynchospora glomerata (L.). 
Schenus glomeratus, L. Sp. Pl., 65 (1753). 
Rynchospora glomerata, Vahl, Enum., ii, 234 (1806). 
New England and Ontario to Michigan, south to Florida, Mis- 
sissippi, and Texas, 
Var. paniculata (A. Gray). 
Rynchospora paniculata, A. Gray, Ann. Lyc., iii, 211 (1835). 
R. glomerata, var. paniculata, Chapm., Fl. 8. States, 528 (1860). 
R. glomerata, var. robustior, Kunth, Enum., ii, 297 (1837), ex deser. 
Maryland and Virginia to Florida and Louisiana. 
Var. leptocarpa, Chapm. 
R. glomerata, var. leptocarpa, Chapm. MSS. in Herb. Col. Coll. 
Very slender, 6-9 dm. long; clusters few, distant, simple, peduneled. 
South Carolina, Florida, and Alabama. 
