245] FLORA OF COLUMBIA AND VICINITY IO3 



160. S. lacustris L. Great bulrush. 



More's lake in water of considerable depth, also in the 

 waterworks dam and a few ponds. 

 Throughout North America and the Old World. 



161. S. fluviatilis (Torr.) Gray. Club-rush. 

 Rare in Bear creek. 



Quebec to Minnesota; New Jersey to Kans.vs. 



162. S. atrovirens Muhl. 



Margins of streams and ponds, and in swales: forms bear- 

 ing new plants among the spikelets are common, and 

 plants with remarkably amply decompound umbels occur. 



Nova Scotia to Manitoba; Georgia to Louisiana. 



69. HELEOOHARIS (ELEOCHARIS) R. Br. 



Spike rush. 



163. H. (E.) acuminata (Muhl.) Nees [//. (E.) compressa 

 Sull.]. 



Swale near More's lake. 



Anticosti to Manitoba; Georgia to Louisiana and Ne- 

 braska. 



164. H. (E.) tenuis (Willd.) Schultes. 

 Wet meadows; infrequent. 



Cape Breton Island to Manitoba; Florida to Texas. 



165. H. (E.) intermedia (Muhl.) Schultes. 

 Marsh meadows and swales. 



Ontario to Minnesota; New Jersey to Missouri. 



166. H. (E.) glaucescens (Willd.) Schultes. \_H.(E.) pains- 

 tris glaucesccns (Willd.) Gray]. 



Common in dry stream-beds, swales and limosc places. 

 Ontario to Minnesota; Florida to Texas. 



167. H. (E.) palustris (L.) R. & S. 



Swamps and pond borders, often in shallow water; very 

 common. 



Labrador to British Columbia; Florida to California: 

 Europe and Asia. 



