80 PROCEEDINGS OP THE AMERICAN ACADEMY 



61. Carex nigella, Boott, Hook. Fl. Bor.-Am. ii. 225. 



Smaller than the last: staminate spikes usually more than one: 

 perigynium elliptical, the orifice bidentate : scales lanceolate and 

 mucronate. — Columbia River, Tolmie. 



* * Stigmas two, or very rarely a specimen may bear a few flowers with three 



stigmas. 



G2. Carex c^spitosa, Linn, Fl. Suec. ed. ii. 333. 



a Facifica, Drejer, Fl. Ex. Hafn. 292. 



C. Drejeri, Lang, Fl. Ratisb. 548. 

 Differs from G. vulgaris in its always single staminate spike, its 

 short pistillate spikes (three fourths inch or less long), which are 

 closely sessile and contiguous, and its round or ovate, gibbous, entirely 

 nerveless, somewhat squarrose, pale perigynium. — Said by Boeckeler 

 to occur in British America, and by Drejer to occur in Greenland. 

 Specimens collected by Dr. Gairdner in Oregon and by Dr. Richardson 

 on the arctic coast were referred here by Dr. Boott, but the specimens 

 are too young for satisfactory identification. No. 593 of Hall's Ore- 

 gon collection, distributed as G. ccespitosa, is G. acuta, var. pallida. 

 Europe. 



Var. FiLiFOLiA, Boott, 111. 182. 



G. aperta, var. angustifolia, Boott, Hook. Fl. Bor.-Am. ii. 218. 



Culms weak, often with basal sheaths somewhat reticulated : leaves 

 weak and slender, more or less involute, about as long as the culm : 

 spikes dark-colored, slender : perigynium more or less ovate, obscurely 

 nerved, deciduous. — Fort Good Hope, Mackenzie's River, lat. 67°, 

 Dr. Richardson; Cascade Mts., lat. about 49°, Dr. Lyall, a stouter 

 form. The materials are far too scanty to allow of a satisfactory 

 estimate of any of the American representatives of this species. 



63. Carex vulgaris, Fries, Mant. iii. 155. 



G. ccespitosa, Gooden. Linn. Trans, ii. 195, t. 21. 



G. Goodenovii, Gay, Ann. Sci. Nat. 2d ser. xi. 191. 



G. anticcensis, Kunze, Suppl. Riedgr. 50, t. 13. 



G. turfosa, Fries, Summa, 228. 



G. Umula ? Gray, Man. 5th ed. 582. 

 Newfoundland, Thaxter, to New England and Wisconsin ; Twin 

 Lakes, Colorado, Wolf ; Alaska, Herb. 



Var. JUNCELLA, Fries, Summa, 230. 



G. Kelloggii, W. Boott, Bot. Calif, ii. 240. 

 Wahsatch Mts., Utah, Watson, Jones; Union Co., Oregon, Cusick, 

 and in British America, Macoun. 



