100 CYPERACE.E. [S, -.KITS. 



3. 3. Rpth'ii, Hoppe ; stem 3-quetrous, leaves 2-3 linear, sjiikclds 

 lateral sessile, glumes ovate acutely 2-lobed mucronate. S. punyenx, Vahi. 

 Sandy banks of St. Ouen's pond, Jersey; fl. June-July. Habit of S. <><'>/</,. 



but smaller, more slender, 6-18 in. ; leaves 4-6 in., channelled, keeled ; 

 spikelets in., sessile ; glumes red-brown ; anther-tips acute ; Lristk-* 1 -L' ; 

 fruit obovoid, pale. DlSTRiB. Europe from Denmark southwards. 

 ** Stem 3-gonous, leafy. Cyme terminal, leafy. 



4. S. marit'imus, L. ; leaves channelled, cymes corymbose, spikelt-ts 

 few cylindric red-brown, glumes acutely 2-lobed awned. 



Salt marshes from Ross and Skye southwards ; fl. July-Aug. Rootstock often 

 tuberous. Stems 1-3 ft., tufted, rigid, leafy below. Leaves often i in. broad, 

 elongate, keeled, dark green. Spikelets -1 in., brown, peduncled'or sessile ; 

 bracts i-1 ft. ; glumes glabrous or pubescent. Bristles 1-6. Fruit com- 

 pressed or 3-gonous, truncate, dotted, shining. DlSTRiB. Europe (Arctic), 

 N. Africa, W. Siberia, N.W. India, N. America. 



5. S. sylvat'icus, L. ; leaves flat, cymes effuse, branches many divari- 

 cate, spikelets small ovoid green, glumes entire obtuse. 



Moist shaded places, from Argyle and Banff southwards ; fl. July. Stems soli- 

 tary, 1-3 ft. , stout, leafy. Leaves large, sometimes fin. broad, keeled. Cymes 

 2-5 in. diam. ; branches slender ; spikelets - in., 3-5 in a cluster. Glumes 

 ribbed. Bristles 6, barbed. Fruit obovoid, mucronate, punctulate. DISTRIB. 

 Europe, Siberia, Dahuria, temp. N. America. 



2. ISOLEPIS, Br. 



Usually small, perennial, slender, tufted green herbs. Leaves narrow 

 or 0. Spikelets fascicled, lateral, small, terete, rarely solitary or ter- 

 minal. Glumes many or few, entire, imbricate all round the rachis, the 

 1-2 lowest sometimes flowerless. Bristles 0. Stamens 1-3. Style simple 

 at the base, deciduous, stigmas 2-3. Fruit compressed or 3-gonous, 

 usually tumid at the top. DISTRIB. Temp, climates, rare in trop. ; spe- 

 cies about 100. ETYM. fcros and Aeir/s, from the equal glumes. 



1. I. seta'cea, Br. ; stems filiform, leaves 1-2 narrow channelled, 

 spikelets 1-3 lateral, fruit obovoid 3-gonous ribbed and furrowed. 

 Gravelly and sandy damp places; ascending to 1,500 ft. in Yorkshire; fl. July- 

 Aug. Stems 3-6 in., tufted, terete, rigid. Leaves short, setaceous. Spike fett 

 usually 2-3, i-J in., ovoid. Glumes ovate, obtuse, green and brown. Sta- 

 mens 2-3. Stigmas 3. Fruit broad, brown, finely striate between the ribs. 

 DISTRIB. Europe, N. Africa? Siberia. 



2. I. Sa'vii, Schultes ; stems filiform leaves 1-2 narrow channelled, 

 spikelets 1-3 subterminal, fruit subglobose 3-gonous not furrowed. 



Wet bogs from Isla southwards, chiefly in the West ; fl. July. Very similar 

 to /. setacea, but larger, paler, often 10 in., with longer leaves ; fruit paler, 

 shining, dotted in lines. DISTRIB. France, Spain, Italy, Turkey, N. Africa. 

 Var. I* monostachys ; spikelet solitary. 1. pygmaea, Kunth. 



3. I. flu'itans, Br. ; floating, leafy, spikelet terminal solitary, fruit 

 obovate compressed mucronate. Eleogiion, Link. 



Marshes and pools, ascending to 1,200ft. in Yorkshire ; fl. June-July. Stem 

 6-18 in., compressed, slender, branched. Leaves 1-2 in., linear, very slender. 



