SEDGE FAMILY 537 



toothed margin. — Wet places ; common. — Fl. June, July. 

 Perennial. 



ttt Spikelets several, dissimilar, the terminal one or more usually 

 wholly staminate, the other (axillary) ones bearing pistils only, 

 or pistillate and staminate flowers 



26. C. Hdlleri (Alpine Sedge). — A rather slender species, 6 — 

 1 8 in. high, tufted, with short runners ; leaves short, narrow, flat, 

 recurved ; spikelets 2 — 4 close together, ovoid, black or dark 

 brown ; styles 3-cleft, jruit green, obovoid, shortly beaked, pro- 

 jecting beyond the glumes. — Clova Mountains; rare. — Fl. July, 

 August. Perennial. 



27. C. atrdta (Black Sedge). — Another tufted alpine species, 

 with runners ; stems 6 — 18 in. high, smooth; leaves broad and 

 flaccid ; spikelets 3 — 6, oblong, shortly stalked, near together, 8 or 

 9 lines long, very dark brown or black, ultimately drooping ; outer 

 bract leafy ; styles 3-cleft ; jruit elliptical, very acutely triangular 

 when ripe, with a short beak. — Mountains of Scotland, Westmore- 

 land, and North Wales. — Fl. June, July. Perennial. 



28. C. poligama (Dark Sedge), found only on an island in 

 Lough Neagh, is a creeping species, with stems 1—2 feet high; 

 leaves narrow, flat, with reddish-brown sheaths with filamentous 

 edges ; spikelets 3 or 4, oblong, in a loose spike ; glumes dark 

 brown, with a green keel prolonged into a point ; styles 3-cleft ; 

 fruit flattened, glaucous green. — Fl. June — August. Perennial. 



29. C. Hudsonii (Tufted Bog Sedge).— A densely tufted species ; 

 stems I — 3 feet high, slender, stiff; leaves narrow, flaccid, with a 

 webbing of filaments on the sheaths ; spikelets 3 or 4, erect, 

 cylindric, i — 2 in. long, sessile, styles 2-cleft ; fruits oblong, in 6 — 

 9 rows, larger than the dark glumes. — Bogs ; local. — Fl. May, 

 June. Perennial. 



30. C. gracilis (Slender-spiked Sedge). — A tufted species, with 

 or without runners; stems 2 — 3 feet high, 3-angled; leaves as long, 

 broad, flaccid, their sheaths not webbed ; spikelets 4 — 9, i — 4 in. 

 long, nodding ; styles 2-cleft ; lower bract long, leaf-like, with long 

 auricles. — Wet places ; not uncommon. — Fl. June — August. 

 Perennial. 



31. C trinervis, a low-growing species, less than a foot high, 

 with long, scaly root-stocks and runners ; stems smooth, 3-angled ; 

 leaves narrow, smooth, involute ; spikelets few, close together, i 

 — I in. long ; lower bract slender, stiff, longer than the spikelet ; 

 fruit compressed, brown, dotted. — Wet sandy places on the Nor- 

 folk coast. — Fl. July, August. Perennial. 



2^2. C. rigida (Stiff Mountain Sedge). — A dwarf alpine form, 



