88 TRANSACTIONS OF THE [fEB. 22, 



* * * Bristles retrorsely barbed. 

 29. Rynctiospora al1>a (L.). 



Schamis nlhus, L. Sp. PL, i, 65 (lliui). 

 Ryncliospora alha, Vahl, Enum., ii, 236 (1806). 



Newfoundland to Alaska, south to Virginia, Florida, Pennsyl- 

 vania, Minnesota, and Oregon. [Europe and Asia.] 



Var. luacra, Clarke. 

 Clusters larger, sometimes 3 cm. broad ; bristles more numerous, 15-20. 

 Florida (Chapman); Texas (Drummond, 281). 



30. Ryncbospora capillacea, Torr. 



Schcenus setacens, Muhl, Gram., 6 (1S17), not Berg, nor R. setacea, Vahl. 

 Ryncliospora capillueea, Torr., Fl. N. and Mid. Stales, 41 (1826). 



Vermont and Ontario to Minnesota, south to New Jersey, Penn- 

 sylvania, and Michigan. 



Var. laeviseta, E. J. Hill. 

 R. capillacea, var. heviseta, E. J. Hill, Amer. Nat., x. 370 (1876). 

 Lake County, Indiana. 



31. Ryncliospora Knieskernii, Carey. 

 Ryncliospora Knieskernii, Carey, Am. .Journ. Sci. (II), iv, 25 (1847). 

 Pine barrens. New Jersey to Virginia. 



32. Ryncliospora glomerata (L.). 



Schctnns glomeratus, L. Sp. PI., 65 (1753). 

 Ryncliospora glomerata, Vahl, Enum., ii, 234 (1806). 



New England and Ontario to Michigan, south to Florida, Mis- 

 sissippi, and Texas. 



Var. paniculata (A. Gray). 



Ryncliospora paniculata, A. Gray, Ann. Lye, iii, 211 (1835). 

 R. glomerata, var. paniculata, Chapm., Fl. S. States, 528 (1S60). 

 R. glomerata, var. robustior, Kunth, Enum., ii, 297 (1837), ex descr. 



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, pediincled. 

 South Carolina, Florida, and Alabama. 



