390 97. CTTEEACE*. 



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

 E. B. S. 2910. H. a. 34. Kunze Riedg. 22. R. 219.— St. 1—2 

 feet iigh, triangular with slightly convex faces and rough edges. 

 Inflorescence often a foot long. Bachis straight, with 3 rough 

 edges. Gl. ovate, membranous, silvery brown, smooth. Lower 

 spikelets wholly male, male at both ends or at either end. Bracts, 

 except the lowest, short. L. channelled. — Marshes ajid pond- 

 sides, rare. P. VI. E. S. 



17. C. axUldris (Good.) ; spikelets several upper ones simple 

 crowded lower distant densely compound, fr. ovoid-lanceolate 

 plane-convex tapering deeply bifid serrulate above the middle, 

 nut obovoid with a beak, gl. shorter than the fruit, root tufted, 

 lower bract as long as or longer than the spike. — E. B. 993. H. 

 a. 33. — St. 1 — 2 feet high, acutely triangular. Eaohis straight, 

 with 3 rough angles. Gl. ovate, membranous, brownish ; midrib 

 often rough, extending to the point. Divisions of the lower 

 spikelets crowded into the axils of the bracts. Bracts, except 

 the lowest, short. L. flat. Spikelets male at the base or at 

 both ends.— Marshes, rare. P. VI. E. S. I. 



18. C. remdta (L.) ; spikelets several all simple upper ones 

 crowded lowerdistantjfr. ovoid-acuminate plane-convex notched 

 at the end serrulate above, nut ovoid with a beak, gl. shorter 

 than the fr., root tufted, bracts lon^.— ^. B. 832. Schk. E. 23. 

 S. a. 35. R. 212. — St. 1 — 2 feet high, trigonous. Rachis with 

 2 rough angles in its upper part. Gl. oblong, membranous, 

 greenish white ; midrib smooth, usually not reaching the point. 

 Several of the bracts long. L. channefled. Sometimes with a 

 thick rooting densely proliferous rhizome. C. tenella (Sm. not 

 Schkr.) is a starved form, — Damp places, P. VI. E. S. I. 



XXX Caspitose. Bracts not lea/like. Spikes contiguous or 

 slightly distant. 



4 Spikes and leaves glaucous or dusky. 



19. C. sielluldta (Good.) ; spikelets ahout 4 globose rather dis- 

 tant, fr. divergent broadly ovoid acuminate plane-convex stri- 

 ate, beak bifid with serrate edges, nut ovoid abruptly narrowed 

 below, gl.' shorter than the fruit.— ^. B. 806. Schk. 0. 14. S. 

 a. 28. R. 214. — St. 6 — 12 in. high, triquetrous, nearly smooth. 

 I^owermost spikelet often with a short bract. Gl. ovate, mem- 

 branous , reddish with a green keel and white edges. Eipe fr. 

 greenish, stellate. — Boggy places, P. V. VI. E. S. I. 



20. C. elongdta (L.) ; spikelets many oblong contiguous, fr. 

 patent oblong-acuminate plane-convex with many ribs on both 

 sides, beak almost entire vpith rough edges, nut linear-oblong 

 tapering below beak very short style persistent, gl. shorter than 



