25 
E. jluviatile. Reported only from Maine, M. L. Fernuld ; shores of 
Lake Champlain, Pringle, and shores of Merrimac river at Ames- 
bury, Mass , but probably frequent on sandy shores throughout 
our range. Early June. Common in Europe 
190. E. fluviatile L. ( E . limosum.) Pipes. Stems all alike, 
1-3 feet high, slightly many-grooved, and after fruiting more or 
less branched, especially near the middle ; branches whorled, five- 
sided, or basal ones nearly round and upright; sheaths with about 
eighteen rigid, lanceolate, black teeth. Borders of ponds and mud- 
dy edges of streams; quite common. North temperate and Arctic 
zones. Late May and early June. 
Illustrated in Gray’s Manual. 
V 
194. E. hiemale L. Scouking Rush. Evergreen, 1-5 feet high, 
rather stout, sparingly branched ; sheaths light colored, black at 
base and summit : teeth about twenty, early falling ; stem rough ; 
ridges with two lines of tubercles. Moist, shaded banks ; general- 
ly distributed, but not abundant. 
Illustrated in Millspaugh’s “Medicinal Plants.” 
This plant fruits from hibernating terminal buds about May 
20th, followed by usually small spikes, sessile just below the 
sheaths or sometimes on lateral branches. Later on, or about the 
15th of June, stems which are the growth of the season are often 
found in fruit, continuing until August. North temperate and 
Arctic zones. 
\ 
196. E. variegatum Schleicher. Stems slender, tufted, 6-18 
inches high, branched from the base, 5-10 grooved ; sheaths green, 
black above, with bristle pointed, deciduous teeth. Evergreen. 
Canaan, Conn. ; Conway, Mass. ; Bellows Falls and Glover, Yt. ; 
Northern Maine, M. L. Fernald. Kennebec at Skowhegan, J. A. 
Allen, River banks in calcareous districts. Distributed through- 
out the northern portion of both hemispheres. Middle of June. 
197. E. scirpoides Michx. Stems evergreen, 3-8 inches long, 
