398 97. CTPBKAOEiB. 



J:J:J: Ccsspkose. Spike compound, often panieled. Fi; ascending, 

 gihbous on its bach, 



13. C. teretius'eala (Good.) ; spikelets forming a dense compound 

 oblong spike, fr. ovate with 2 — 5 central riba on the convex side 

 (back), ftea/c'bidentate serrulate split to its base and overlapping 

 on the back, nut turbinate with a very short beak convex, style 

 not thickened at the base, at. trigonous and rough above. — 

 B. B. 1065. Schh. D. 19. T. 69. H.^. 9. ^. 222.— Root forming 

 scattered simple tufts. St. 1 — 2 feet high, slender. — 3. C. Ehr- 

 hartiana (Hoppe) ; root more ceespitose, spike long rather loose, 

 St. triquetrous above. Sy. E. B. 620. — ^Boggy meadows, rare. 

 /3 near Manchester. P. VI. B. S. I. 



14. C. paradox' a (Willd.) ; spikes nai-rowly panided lower 

 branches rather distinct, fr. ovoid with many short elevated ribs 

 near its base, beak obliquely bidentate serrulate not split nor 

 winged on its bach, nut rhomboidal constricted below doubly 

 convex with a short beak, style slightly enlarged at the base, st. 

 trigonous and rough above.— £■. B. S. 2896. Schk. E. 21. H. 

 a. 12. a. 222. — Boot densely tufted, crowned with the fibrous 

 remains of decayed leaves. St. 1 — 2 feet high, slender. — Bogs. 

 Near Mullingar, Ireland. Near York. Hoveton, Norfolk. P. 

 VI. VII. E. I. 



15. C. paniculdta (L.) ; spikes panieled with long diverging 

 branches, fr. ovoid faintly many-veined with a bifid fringed beak 

 split to its base and overlapping on the back, nut ovoid blunt nar- 

 rowed below plane-convex, beak slightly thickened up^oards, st. 

 triangular.—E. B. 1064. Schh. D. 20, Ttt. 163. H. a. 19. 

 It. 223. — Root forming dense elevated tufts. St. stout, 2 — 3 

 feet high. Panicle usually large and spreading or reduced to a 

 slender compound (or even simple) spike. Bracts all much 

 shorter than the spike. — Bogs. P. VI. E. S. I. 



ttt Spikeleta male at their base (or at both ends). 

 X Sdbole far-creeping. 

 [C. brizoides (L.) was probably an eacape.] E. 



XX CcBspitose, Bracts lea/like. Lower spikelets distant, simple or 

 compound. 



16. C. Boenninghausenidna (Weihe) ; spikelets several upper 

 ones simple crowded lower distant alternately branched, fr. lan- 

 ceolate plane-convex tapering serrulate from below the middle, 

 beak deeply split on one side, nut ovoid elliptic, gl. equalling the 

 fruit, root tufted, lower bract at least equalling the spike. — 



