w 
8 
6, E. fluviatile L, Snake Grass, Slender subscandent aquatic plants, 
arising from slender unbranched subvertical rootstocks, the stems watery-~- 
herbaceous, laxly procumbent, 60 cm, to 1 m. long, shallowly fenfmany (EO) 
furrowed, the ridges somewhat indistinct, minutely siliceous-roughened, 
rather thin, somewhat wing-like in age; sheaths all subappressed, cylindric, 
the lower 6-8 mm, long, darkening, the upper shorter, greenish, all 
permanently tipped with subulate castaneous teeth, the lowermost a little 
flaring; strobilus crowning an ordinary summer shoot, }kemmehootseemmontp 
sampta, developing simple subfiliform branches after fruiting, the strobilus 
ovoid, obtuse, stipitate-exserted beyond the sheath. (E. limosum L,) 
Swamps and river banks; known in our region only from Upper Priest 
Lake, 2700 ft., Epling 7199. 
