526 



CYPERAcEiE 



smaller, less slender, darker plant, 2 — 6 in. high, with i or 2 

 short, subulate leaves on each stem ; spikelets usually 2—3 I — J in. 

 long, ovoid, lateral ; outer bract long, subulate, resembling a con- 

 tinuation of the stem ; glumes ovate, blunt, dark brown, with green 

 midribs ; style 3-cleft ; nut very small, marked with about 8 longi- 

 tudinal ribs and furrows. — Moist sandy places ; common. — Fl. 

 July, August. Perennial. 



SCiRPUS HOLOSCHCENUS 



{Round-headed Mud-rusk). 



sdRPUS LACUSTRIS 



{Common Bulrush). 



7. .5'. Holosckanus (Round-headed Mud-rush). — Stems stiff, 

 cylindrical, i — 4 feet high, with i or 2 stiff leaves sheathing their 

 bases ; spikelets very numerous and small, upwards of 30 together 

 in compact globular heads, each \ — \ in. diameter, of a light 

 brown colour, forming a lateral umbel ; the largest outer bract 

 stiff, forming a continuation of the stem. — Sandy sea-shores in 

 Somerset, North Devon, and the Channel Islands. — Fl. September, 

 October. Perennial. 



