278 CYPERACEAE. 



5. Rynchospora capillacea Torr. Capillary Beaked-rush. (Fig. 652.) 



Rhynchospora capillacea Torr. Comp. 41. 1826. 



Culms filiform, tufted, glabrous, 6 / -2O / talL 

 Leaves filiform, less than %" wide, much shortf 

 than the culm, the lower very short; spikelets few, 

 in 1-3 terminal and axillary loose clusters, oblong, 

 acute at both ends, 2 // ~3 // long; scales ovate- oblonj 

 chestnut-brown, keeled, mucronate; bristles 6, slen- 

 der, downwardly barbed, about equalling or becom- 

 ing longer than the achene and tubercle; achene 

 narrowly oblong, short-stalked, light brown, mi 



'// // \ \ ftHll / nutely wrinkled, lenticular; style 2-cleft; tuberch 



compressed, triangular-subulate, dark brown, abov 

 one-half as long as the achene. 



In bogs, Vermont and Ontario to Minnesota, sout 

 to New Jersey, Pennsylvania and Michigan. July-Av 



Rynchospora capillacea laeviseta E. J. Hill, Am. Na 



10 : 370. 1876. 

 Bristles smooth. Northern Indiana and Michigan. 



6. Rynchospora Knieskernii Carey. Knies- 

 kern's Beaked-rush. (Fig. 653.) 



Rhvnchospora Knieskernii\ Carey, Am. Journ. Sci. (II.) 



4: 25. 1847. 



Culms slender, tufted, smooth, S'-iS' tall. Leaves 

 narrowly linear, flat, about Y*" wide, much shorter 

 than the culm; spikelets numerous, in several distant 

 compact clusters, oblong, acute, about i // long; 

 scales chestnut-brown, ovate; bristles 6, downwardly 

 barbed, equalling the achene; achene obovate, lenticu- 

 lar, brown, minutely wrinkled; style 2-cleft; tubercle 

 triangular-subulate, pale, one-half as long as the 

 achene or less and slightly 'decur rent on its edges. 



Pine barrens, New Jersey to Virginia. July-Aug. 



7. Rynchospora glomerata (L,. ) Yahl. 

 Clustered Beaked-rush. (Fig. 654.) 



Schoenns glomeratus L. Sp. PI. 44. 1753. 

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



Rootstocks slender, culms smooth, triangular, 

 slender or rather stout, i-3 high. Leaves 

 flat, i // -2 // wide, rough-margined, shorter than 

 the culm; spikelets several or numerous, in 3-7 

 corymbose- capitate axillary rather loose clusters, 

 oblong, narrowed at both ends, i l /2 r '-2" long; 

 scales lanceolate, rich dark brown; bristles 6, 

 downwardly barbed, 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, Maine to Ontario and Michigan, 

 south to Florida and Texas. July-Sept. 



Rynchospora glomerata paniculata (A.? Gray) Chapm. Fl. S. States, 528. 1860. 

 Rhynchospora paniculata A. Gray, Ann. Lye. X. Y. 3: 211. 18^5. 



Culm stouter, sometimes 4 '4 tall; leaves usually wider; spikelets very numerous in compound 

 clusters. Maryland to Florida and Louisiana. 



Rynchospora glomerata minor Britton, Trans. N. Y. Acad. Sci. n: 90. 1892. 



Culms very slender, 5 -10' tall; leaves 'A" wide or less; clusters 2 or 3, small, with 3-10 spike- 

 lets. Massachusetts and New Hampshire. 



Rynchospora glomerata discutiens Clarke; Britton, Trans. N. Y. Acad. Sci. ii: 89. 1892. 

 Bristles smooth, or barbed at the apex only. New jersey to North Carolina. 



