344 



CYPERACEAE. 



VOL. I. 



7. Rynchospora glomerata (L.) Vahl. 

 Clustered Beaked-rush. Fig. 847. 



Schoenus glomeratus L. Sp. PI. 44. 1753. 

 Rynchospora glomerata Vahl, Enum. 2: 234. 1806. 



Rootstocks slender, culms smooth, triangular, 

 slender or rather stout, i-4l high. Leaves flat, 

 4"-2" wide, rough-margined, shorter than the 

 culm ; spikelets several or numerous, in 2-7 

 corymbose-capitate axillary rather loose clusters, 

 oblong, narrowed at both ends, i|"-2" long; 

 scales lanceolate, rich dark brown ; bristles 6, 

 downwardly barbed, rarely smooth, longer than 

 or equalling the achene and tubercle ; achene 

 obovate, lenticular, smooth, dark brown ; tubercle 

 subulate, about as long as the achene. 



In moist soil, New Brunswick to Ontario, Mich- 

 igan, Arkansas, Florida and Texas. Consists of nu- 

 merous races, differing in size, in width of leaves 

 and in development of the inflorescence. July-Sept. 

 False Bog-rush. 



8. Rynchospora axillaris (Lam.) Britton. 

 Capitate Beaked-rush. Fig. 848. 



Schoenus axillaris Lam. Tabl. Encycl. i : 137. I79 1 - 

 Rhynchospora cephalantha A. Gray, Ann. Lye. N. Y. 



3: 218. 1835. 



R. axillaris Britton, Bull. Torr. Club 15 : 104. 1888. 

 Rynchospora axillaris microcephala Britton, Trans. 



N. Y. Acad. Sci. n : 89. 1892. 



Culms stout, 3-angled, 2-4 tall. Leaves flat, 

 keeled, i"-i4" wide; spikelets spindle-shaped, 

 2i"-3" long, exceedingly numerous, in several 

 short-peduncled axillary and terminal very dense 

 globose heads 4"-i2" in diameter ; scales dark 

 brown, ovate-oblong, acute; bristles usually 6, 

 longer than or equalling the achene and tubercle, 

 downwardly or rarely upwardly barbed ; achene 

 obovate, brown, smooth, lenticular; tubercle subu- 

 late, about as long as the achene, somewhat de- 

 current on its edges. 



In swamps, Long Island to Florida and Louisiana, 

 near the coast. Cuba. Southern races have much 

 smaller heads and smaller achenes than northern 

 ones. July-Sept. 



9. Rynchospora f usca (L.) Ait. Brown Beaked- 

 rush. Fig. 849. 



Schoenus fuscus L. Sp. PI. Ed. 2, 1664. 1763. 

 R. fusca Ait. Hort. Kew, Ed. 2, i : 127. 1810. 



Rootstocks short, culms slender, 3-angled, smooth, 

 tufted, 6'-i8' tall. Leaves setaceous, channeled, 

 scarcely 4" wide, much shorter than the culm; spike- 

 lets spindle-shaped, acute, about 24" long, several, or 

 rather numerous, in 1-4 loose clusters; scales oblong- 

 lanceolate, brown, shining, concave; bristles 6, upwardly 

 barbed, often unequal, the longer ones usually exceed- 

 ing the achene and tubercle ; achene narrowly obovate, 

 turgid-lenticular, smooth, shining; tubercle triangular- 

 subulate, nearly as long as the achene, its margins ser- 

 rulate or nearly smooth. 



In bogs, Newfoundland to Delaware and Florida, west 

 along the St. Lawrence and Great Lakes to Michigan. Also 

 in Europe. July-Aug. 



Rynchospora filifolia Torr., with long filiform leaves and much smaller achenes. of the South- 

 eastern States and Cuba, has recently been found to range northward into southern New Jersey. 



