406 



CYPERACEAE. 



Vol. I. 



137. Carex amphibola Steud. Narrow-leaved Sedge. Fig. 1004. 



Carex amphibola Steud. Syn. PI. Cyp. 234. 1855. 

 Carex grisea var. angustifolia Boott, III. 34. 1858. 

 Carex grisea var. ( ?) rigida Bailey, Mem. Torr. Club 1 : 

 56. 1889. 



Glabrous, culms very slender, slightly scabrous above, 

 erect, or spreading, i°-2° 'high. Leaves l"-2" wide, 

 mostly erect and somewhat rigid, the basal shorter than 

 the culm; bracts similar to the upper leaves, erect, not 

 over 1" wide, overtopping the spikes; staminate spike 

 usually peduncled, sometimes sessile ; pistillate spikes 

 2-4, erect, i'-i' long, less than 2" thick, loosely several- 

 flowered, the upper sessile, the lower often from lower 

 axils on long filiform, stalks ; perigynia oblong or obo- 

 void, scarcely turgid, firm, pointed but beakless, 3-angled, 

 many-striate, more or less 2-ranked, 2" long, about 1" 

 thick, longer or lower shorter than the ovate, scarious- 

 margined, awned spreading scales ; stigmas 3. 



In dry soil, New York to Iowa and Missouri, south to 

 Florida and Texas. Intergrades with the next. April-June. 



138. Carex grisea Wahl. Gray Sedge. Fig. 1005. 



Carex grisea Wahl. Kongl. Vet. Acad. Handl. (II.) 24 : 

 154. 1803. 



Glabrous, culms stoutish, erect or ascending, smooth 

 or nearly so, i°-24° high. Leaves light green, some- 

 times slightly glaucous, flat, usually soft and spread- 

 ing, 2"-3i" wide, the basal shorter than or exceed- 

 ing the culm; bracts similar to the leaves, spread- 

 ing, much overtopping the spikes ; staminate spike 

 solitary, sessile, or short-peduncled ; pistillate spikes 

 3-5, dense, oblong, 5-15-flowered, 4"-i2" long, 2"- 

 3i ' thick, the upper usually sessile and close together, 

 the lower slender-stalked and distant, but not from 

 lower axils; perigynia oblong, about 24" long, 1" 

 thick, nearly terete, turgid, subacute but beakless, 

 finely many-striate, longer or the lower shorter than 

 the ovate, scarious-margined, cuspidate or awned 

 scales ; stigmas 3. 



In woods and thickets, Maine to Ontario and Minne- 

 sota, south to North Carolina and Arkansas. May-July. 



139. Carex glaucodea Tuckerm. Glaucescent Sedge. Fig. 1006. 



Carex grisea var. mutica Carey, in A. Gray, Man. 552. 

 1848. Not C. mutica R. Br. 1823. 



Carex glaucodea Tuckerm. ; Olney, Proc. Am. Acad. 7 : 

 395- 1868. 



Similar in habit to Carex grisea, but pale and usu- 

 ally very glaucous all over, culms smooth, erect or 

 spreading, 4-24' high. Leaves 2"-$" wide, the basal 

 shorter or longer than the culm; bracts foliaceous, 

 overtopping the spikes ; staminate spike sessile or nearly 

 so; pistillate spikes 3-5, S"-iS" long, 24" thick, erect, 

 densely 10-45-flowered, widely separate, the lower 

 slender-stalked; perigynia oblong, many-striate, l4"-2" 

 long, sub-acute, beakless, mostly nearly twice as long 

 as the ovate scarious-margined, acute, cuspidate or 

 short-awned scales; stigmas 3. 



In open fields and meadows, Massachusetts to Ontario, 

 Illinois, Virginia and Arkansas. Intergrades with the next. 

 May-July. 



