366 96. cyperacejE. 



lanceolate veined narrowly margined bifid with serrated edges 

 above, nut elliptical, gl. shorter than the fr. acute the midrib 

 not reaching the top, st. with scabrous angles. — C. intermedia 

 Good., _E. B. 2042. ScM. B. 7. H. a. 14. R. 210.— Height 

 1 — 2 feet. Fr. about as long as gl. ; usually abortive and twice 

 as long. Lower bract with a slender leaflike point. — Marshy 

 places. P. V. VI. 



9. C. arenaria (L.) ; spihelets in an oblong interrupted spike 

 upper barren lower fertile intermediate barren at the end, fr. 

 ovate veined winged and finely serrate from the middle to the 

 bifid top of the beak, nut bluntly ovate, glumes longer than the 

 fr. acuminate, st. scabrous above. — E. B. 928. Schk. B. and Dd. 

 6. H. a. 13. R. 209. — Height 1 foot. Rhizome superficial. 

 Lowermost bracts with slender leaflike points. — Sandy places. 



XX CcEspitose. Spike simply compound. Fr. squarrose, not 

 gibbous. 



10. C vulpina (L.) ; spikelets compound in a cylindrical 

 oblong crowded spike, /r. ovate-acuminate plane-convex veined, 

 beak bifid finely serrate, nut oval tipped with a beak slightly 

 thickened upwards, gl. mucronate shorter than the fruit, st. tri- 

 quetrous with scabrous angles, bracts setaceous. — E.B. HO], 

 Schk. C. 10. R. 217. — Height 2 feet. Stj firm ; faces concave. 

 L. broad. Fr. palish green. Beak of the nut constricted, its 

 base narrower than the base of the style. — 0. nemorosa (Reb.) ; 

 spikelets greenish, bracts long. R. 216. — "Wet places. P. VL 



11. C. muricata (L.) ; spikelets approximate, spike oblong 

 dense or interrupted below, fr. ovate-acuminate plane-couvex 

 obsoletely veined bifid finely serrate above divergent, nut ovate 

 its beak extremely short, gl. mucronate shorter than the fruit, st. 

 triquetrous with rough angles. — E. B. 1097. R. 215. — Height 

 1 — 2 feet. St. slender but strong. L. narrow. Lowermost 

 spikelets not more than their own length distant from each 

 other. Fr. much larger than that of No. 12, with a broad flat 

 beak with very sharp edges. — Gravelly pastures. P. VL 



12. C. dividsa (Good.) ; spikelets distant the upper ones ap- 

 proximate, fr. ovate acute plane-convex obsoletely veined biiid 

 smooth ascending, beak roughish at the edges, nut ovate-oblong 

 compressed its beak extremely short, gl. mucronate shorter than 

 the fruit, st. triquetrous with rough angles above, bracts short 

 setaceous.— i;. B. 629. ScWc. Dd. and Ww. 8.9. H. a. 16. B.220. 

 — Height 1 — 2 feet. St. lax, slender, flaccid. Spikelets grayish, 

 usually distant, 1 or 2 lowest often lengthened into a short branch. 



