BOTANICAL GAZETTE. 87 
ellipticis, basi acutis, apice apertis, 4-6 lin. longis. Squamis: mem- 
branaceis, argenteis, demum pallide castaneis, lanceolatis, acutis, 
breve scabro-aristatis, perigyniis angustioribus, inferioribus iis 
longioribus superioribus brevioribus. Perigyniis pallide viridi- 
bus, 24-3 lin. longis, 4 lin. latis, ovalibus vel subobovatis alatis 
acuminato-rostratis, rostro bidenticulato margine serrato dentato, 
dorso fisso, tenui nervatis, lateribus corrugatis. Achenium cas- 
taneum, oblongum, lenticulare, stipitatum perigynio laxe inclu- 
sum, eo duplo brevius et angustius. 
mmon on margins of ponds and in ditches in sandy soil, 
E. Massachusetts. Mt. Desert, Maine. 
ufted, bearing many stems. Stems slender, the sharp angles 
rough, leaved below the middle. Leaves long-sheathed, a line 
acute at base, open above, 4—6 lin. long. Scales membranous, sil- 
very, becoming pale chestnut, lanceolate, acute, roughly short- 
awned, narrower and the lower longer and the upper shorter than 
the perigynia. Perigynia pale green, 24-3 lin. long, 2 lin. broad, 
oval, or subobovate, winged, acuminate, beaked, the beak biden- 
ticulate, serrate-toothed on the margin, fissured on the back, deli- 
cately nerved, the sides wrinkled. Z 
PREGRACILIS,sp.n. Culmis (ima parte et foliis culmeis 
deficientibus) 26 poll. longis, strictis tenuissimis, lateribus vix 4 lin- 
ig Mas 1: ae i¢ F 
ineis ellipticis paucifloris. Bracteis e basi ovata, margine hyalina 
complectente, attenuato aristatis, aristis scabris, subexcurvis spi- 
culis longioribus, culmo plerumque brevioribus. Squamis bracteis 
conformibus, marginibus latioribus, aristis brevioribus, perigynia 
tegentibus. Perigyniis cartilagineis ferrugineis, basi pallidis, gla- 
bris, ovatis, accuminato-rostratis substipitatis 14 lin. longis, # lin. 
latis, rostro antice alte fisso, fissure marginibus albidis, facie ex- 
eriore convexis, faciei interioris marginibus incurvis, supra serra- 
