CAREX. 3/1 



29. C. rigida (Good.); spikes erect, barren 1, fertile oval or 

 shortly cylindrical dense subsessile, lower bract leaflike, /r. ellip- 

 tical lenticular without veins, nut roundish blunt with a slender 

 beak, st. triquetrous rough towards the top, I. curving outwards 

 with deflexed edges. E.B.204J. H. a. 40. R.225. C. saxatilis 

 L. ? St. 6 in. to a foot or more high. L. broad, flat, keeled, 

 rigid. Bracts without sheaths. Spikes near together, short, 

 rarely narrowed and laxly flowered below. Gl. about exceeding 

 the fr., purple with a green keel. Nut rather longer than broad. 

 In wet and stony places on mountains. P. VI. VII. 



ttt Stigmas 2. Sheaths not webbed. Fertile spikes erect. 

 Edges of leaves ultimately involute. GL narrower than 

 fruit. 



30. C. aquatilis (Wahl.) ; spikes erect, barren 1 or more, fer- 

 tile 3 or 4 long narrowed below lower ones stalked, bracts leaf- 

 like erect overtopping the stem, fr. elliptical lenticular without 

 veins broader than the gl., nut oblong narrowed below with a 

 short slender beak, st. trigonous smooth. E. B. S. 2758. St. 

 1 4 ft. high, with convex faces. Spikes rather distant. Gl. 

 usually short, narrower than the yellowish-green fr., reddish- 

 purple with a pale midrib. Alpine boggy table-lands of the^ 

 Clova mountains and in the valley byVhe bridge at Clova." 

 P. VII. S. 



31. C.vulgaris (Fries); spikes erect, barren 1 or 2, fertile 

 3 4 subsessile cylindrical, bracts with short auricles leaflike, 

 fr. elliptical plane-convex with many veins below and a short 



entire beak, nut roundish very blunt, st. triquetrous rough to- 

 wards the top. C. ccespitosa Sm., E. B. 150/. C. Goodenovii 

 Gay. St. about a foot high. L. slender, not keeled. Bracts 

 without sheaths. Spikes near together, short. Gl. blunt, shorter 

 than fr., purple; keel slender, pale green. Fr. greenish or 

 with a purple tinge. Nut rather broader than long. Marshes. 

 P.V.VI. 



32. C. Gibsoni (Bab.); spikes erect, barren 1, fertile 2 4 

 oblong narrowed downwards slightly stalked, bracts with short 

 auricles leaflike, fr. lanceolate acute with many veins not reach- 

 ing the summit, nut broadly obovate very blunt with a short 

 thick beak, st. triquetrous rough towards the top. A. N. H. xi. 

 t. 5. St. 6 8 in. high. L. flat, not keeled ; sheaths not fila- 

 mentous, lowest leafless. Lowest bract long. Spikes lax below. 

 Glumes falling short of the fr., oblong, blunt, purplish-brown 

 with a broad green band up the midrib ; on the barren spike 

 paler, obovate-lanceolate. Perigone nearly twice as long as the 

 nut, gradually narrowed from below the middle to the top. Nut 

 rather broader than long. Nearly allied, I think, to C. vulgari* 



