368 96. CYPERACE^. 



+% Ceespitose. Bracts leaflike. Lower spikelets distant, simple 

 or compound. 



17- C. Boenninghauseniana (Weihe) ; spikelets several upper 

 ones simple crowded lower distant alternately branched, fr. 

 lanceolate plane-convex tapering strongly serrate from below 

 the middle, beak deeply split on one side, nut ovate-elliptical 

 pointed, gl. equalling the fruit, root tufted, lower bract at least 

 equalling the spike. E. B. S. 2910. H. a. 34. Kunze Riedg. 

 22. R. 219. St. 12 feet high, triangular with slightly convex 

 faces and rough edges. Inflorescence often a foot long. Rachis 

 straight, with 3 rough edges. GL ovate, membranous, silvery 

 brown, smooth. Lower spikelets wholly barren, barren at both 

 ends or at either end. Bracts, except the lowest, short. L. 

 channeled. Marshes and pond-sides. P. VI. E. S. 



18. C. axillaris (Good.) ; spikelets several upper ones simple 

 crowded lower distant densely compound, fr. ovate-lanceolate 

 plane-convex tapering deeply bifid serrate above, nut obovate 

 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. Rachis 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 barren at the base or at 

 both ends. Marshes. P. VI. 



19. C. remota (L.); spikelets several all simple upper ones 

 crowded lower distant, fr. ovate-acuminate plane-convex notched 

 at the end serrate above, nut ovate with a beak, gl. shorter than 

 the fr., root tufted, bracts long. E. B. 832. Schk. E. 23. H. 

 a. 35. R. 2\2.St. 12 feet high, trigonous. Rachis with 2 

 rough angles in its upper part. Gl. ob;ong, membranous, green- 

 ish-white; midrib smooth, usually not reaching the point. Several 

 of the bracts long. L. channeled. Sometimes with a thick 

 rooting densely proliferous rhizome. C. tenella (Sm.) is said to 

 differ by its small spikelets with a terminal sterile fl. and fr. 

 equally convex on both sides. It should be looked for " in a 

 wood by the Esk, Angusshire." Damp places. P. VI. 



++ CfEspitose. Bracts not leaflike. Spikes approximate or 

 rather distant. 



4- Spikes and leaves glaucous or dusky. 



20. C. stellulata (Good.); spikelets about 4 roundish rather 

 distant, fr. divergent broadly ovate acuminate plane-convex stri- 

 ate, beak bifid with serrate edges, nut ovate obtuse tapering 



