SEDGE FAMILY 139 



lateral spikes 2-3, pistillate, sessile to slender-peduncled, approximate, 12-48 

 mm. long, 5 mm. wide; scales lanceolate, sharp-pointed; perigj'nia obovoid, 

 nerveless, abruptly minutely beaked. Low ground: B.C. — Mont. — Utah — Calif. 

 Submont, Je-S. 



135. C. lenticularia Michx. Densely cespitose; culms 3-6 dm. high, sonie- 

 what roughened; staminate spikes 1-2, often partly pistillate; pistillate spikes 

 2-5, sessile or short-peduncled, approximate or lower remote, 1-5 cm. long, 3-4 

 mm. wide; scales obtuse, with broad light-colored center; perigvnia 2.5 mm. long, 

 1.5 mm. wide, minutely beaked. River and lake shores: Lab.— Mass. — Minn. 

 — Sask. Boreal. Je-S. 



136. C. Kelloggii W. Boott. Cespitose; culms 3-7 dm. high, slender, some- 

 what roughened; staminate spike usually 1; pistillate spikes 3-5, sessile or nearly 

 so, approximate or slightly separate, linear, 1.5-4 cm. long, 4-6 mm. wide; scales 

 obtuse or acutish, with broad hght-colored center; perigynia 2.5 mm. long, 1.25 

 mm. wide, abruptly minutely beaked. C. vulgaris var. lipocarpa Holm. Alaska 

 — Ida. — Colo. — Utah — Calif. Submont.— MonL Je-Au. 



137. C. aquatilis Wahl. Rootstock slender, stoloniferous; culms 2-7 dm- 

 high, sharply triangular above, slender, reddened at the base; leaf-blades 2-4 

 mm. wide; staminate spikes 1-2, slender; pistillate spikes 2-4, se^sde or short- 

 peduncled, separate, linear, 1.5-6 cm. long, 4-6 mm. wide; scales oblong-obovate 

 to lanceolate, obtuse or acutish, blackish, 1-nerved; pengj-nia elhptic-obovate, 

 2.5 mm. long, 1.25 mm. wide, nerveless, but with a median ridge, sub-stipitate, 

 puncticulate, reddish-dotted all over, granular, very minutely beaked. C. vari- 

 abilis Bailey. C. rhomboidea Hohn. Wet meadows and swamps: Lab.— Que.— 

 N.M.— Calif.— Yukon; Eurasia. Mont.—Subalp. Je-Au. 



138. C. substricta (Kiikenth.) Mackenzie. Cespitose and stoloniferous; 

 culms 6-14 dm. high, sharply triangular, reddened at the base; leaf -blades 

 often glaucous, 4-8 mm. wide; staminate spikes 2-3, slender; pistillate spikes 

 2-4, sessile or short-peduncled, separate, linear, 2-7 cm, long, 4-6 mm. wide; 

 scales lanceolate, sharp-pointed, reddish brown with broad light-colored center, 

 narrower than the perig\'nia; perigynia 3 mm. long, obovate, tapermg to the 

 stipitate base, obscurely nerved, but the marginal nerves prominent, resinous- 

 dotted, abruptly very minutely beaked. C. aquatilis Am. auth., not W ahl. 

 Swamps: Me.— N.Y.— Neb.— Sask. Plain, Je-Au. 



139. C. nebraskensis Dewey. Rootstocks creeping and stoloniferous; 

 milrriQ 9.^^-10 Hm hitrh' 1p,if-blades 4r-8 mm. wide, flat: staminate spikes 1-2; 



5-6 



contiguous or the lower separate; scales lanceolate, obtusisti to acummace, 

 blackish with hght midvein; perigjTiia ascending, 3-3.5 mm. long, 2 nun. wide, 

 rounded at the base. Meadows and swamps: S.D.— Kans.— ^.M.— v^alit.— 



B.C. Plai7i — Submont. My-Jl. 



140. C. Emoryi Dewev. Cespitose, long stoloniferous; culms 5-10 dm, 

 high, sharply triangular, rarely reddened at the base; leaf-blades green, 3-7 mm. 

 wide; staminate spikes 1-3, slender; pistiUate spikes 2-4, sessile or short-ped- 

 uncled, more or less strongly separate, narrowly linear, 4-10 cm.long,d-a mm. 

 wide; scales lanceolate, sharp-pointed, with broad light-colored center and hya- 

 line margins, narrower than the perig^'nia; perigj'nia ver^' , numerous, oval or 

 ovate, 2.5 mm. long, rounded at the base, sessile or substipitate, few-nerved, 

 the marginal nerves not prominent, puncticulate, abruptly mmutelv but notice- 

 ably beaked. Swales and river banks: N.J.— D.C.— Tex.— N.M.— Colo.— 

 N.D. — Man. Plain — Submont. 



141. C. prionophylla Holm. Rootstocks thick; culms ^\) am, nign, strongiy 



lyllopodic and reddened at base, wing-angled and serrulate; leaf-blades 



4-5 mm wide, very scabrous; spikes 4-5, the termmal staminate, ttie 



,e, contiguous 

 3^ mm. wid 



perigjTua 



mmutely beaked. Mountain streams: Ida.— Wash. Subfnont. Jl. 



