joS GLUMACEjE 



raised dots. Rivers and ponds, usually near the sea. Fl. June, 

 July. Perennial. 



7. S. carinatus (Trigonous-stemmed Bulrush). Similar to the 

 preceding, but the stems are a bright deep green, obtusely tri- 

 angular near the top, and the glumes are smooth. Near rivers in 

 the southern counties ; rare. Fl. June, July. Perennial. 



Spikelcts solitary, terminal ; bristles 4-6. 



8. S. fiauciflorus (Chocolate-headed Club-Rush). Ste)ns tufted, 

 slender, not 6 inches high, many of them barren ; spikelet small, 

 with not more than 5 or 6 flowers ; bristles 6 ; style 3-branched. 

 Wet heaths ; frequent. Fl. July, August. Perennial. 



9. S. caspitosus (Deer's-hair or Scaly-stemmed Club-Rush). 

 Stems densely tufted, 6-12 inches high, covered for some distance 

 from the base with more prominent sheaths than in S. pauciflorus, 

 and these bear leafy tips -^-\ inch long ; bract about as long as 

 the spikelet, with a somewhat leafy tip ; flowers usually 6-8 ; 

 bristles 6 ; style 3-branched. Marshy places ; frequent. Fl. June 

 to August. Perennial. 



10. S. parvulus (Least Club-Rush). A very small plant with 

 grooved stems only 1-2 inches high ; sheaths transparent ; leaves 

 similar to the stems ; spikelels about ^ inch long, pale ; bristles 

 4-6. Sandy places near the sea in the south ; rare. Fl. July. 

 Annual. 



Spikelels 1-3 ; bristles none 



11. S. fluitans (Floating Club-Rush). Stems long, slender, 

 brandling, floating on the water or forming soft, dense masses on 

 its margin ; leaves linear, -2 inches long ; spikelcts solitary, ter- 

 minal, not inch long ; outer bract without a leafy point ; style 

 2-branched. Pools and ditches ; common. Fl. June, July. 

 Perennial. 



12. S. setaceus (Bristle-like Club-Rush). A little plant only 2 or 

 3 inches high, forming dense tufts ; stems slender, with 1 or 2 awl- 

 shaped leaves sheathing each at the base ; spikelels solitary or 

 2 or 3 together in a little cluster which appears to be lateral, ovoid, 

 seldom inch long ; glumes broad, dark brown with a green mid- 

 rib ; style 3-branched. Wet, sandy places ; common. Fl. July, 

 August. Perennial. 



13. S. cernuus (Savi's Club-Rush). Very similar to S. setaceus, 

 but often still more slender and the outer bract is scarcely longer 

 than the spikelet. Marshes and edges of pools, usually near the 

 coast ; rare. Fl. July. Annual or perennial. 



