16 



/Oa.) The perigynia are considerably like those of the C. 

 canesceus group. The species stands midway between C, f estiva 

 and C. Heleonastes. Mountains, Colorado to California ; evi- 

 dently not common. I have seen the original of C. Bonplandii 

 var. angtistifolia, Boott, from South America, and it bears no im- 

 mediate relation to this plant. Boott, in founding his C, Bon- 

 plaudit var. minor^ remarks, " perigyniis ad marginis rarissime 

 scabris/' but his specimens have perfectly smooth fruit. He must 

 have confounded with them some of the weak forms of C. f estiva, 



Carex Jonesil 

 Allied to C. nervina^ Bailey, and C. stipata^ Muhl. : 



V 



Slender, but erect and somewhat stiff (7 to 18 in. high) ; 

 culm sharply angled and rough, somewhat exceeding the 

 narrow leaves ; spikes several to many, densely aggregated into 

 a small oblong or ovoid head (an inch or less long), which is 

 bractless; perigynium small, ' lanceplate from a truncate base, 

 stipitate, very strongly many-nerved, marginless, smooth or but 

 slightly rough on the angles above, the long and brown beal 

 nearly entire; scale brown, muticous or obtuse, somewhat shorter 

 than the perigynium. Readily distinguished from C. nervina by 

 its narrow and sharp culm, narrow leaves, simple head, and the 



+ 



absence of sponginess at the base of the perigynium. (230a.) 

 Soda Springs, Nevada Co., Cal, 7,000 feet, 1881, M. E. Jones ; 

 Cascade Mts. 4,000 feet, Washington, 1882, Tweedy, Hb. Bailey. 



23. — Carex nudata, W. Boott, var. angustifolia. 



C^ aperta, Boott, var. angustifolia, Boott, Hook. FL Bon- 

 Am. 11. 218 (1840), V. s. Hb. Boott., and Hb. Gray. 



C. C(2Spitosa, L., vdiV. Jilifolia, Boott in part, III 182 (1867) ; 

 Bailey, Proc. Amer. Acad. Arts and Sci. xxii. 80 (1886). 



Differs from C. nudata in its much more slender and lax 

 habit, and narrower leaves; spikes short (^ in. or less), sessile or 

 nearly so; perigynium shorter and relatively broader, much more 

 abruptly contracted above, faintly nerved. The leading feature 

 of C. nudata is its slim, almost lanceolate perigynium, which is 

 empty above. Fort Good Hope, Mackenzie's River, lat 67 

 Richardson : Cascade Mountains, about lat 49"^, Lyall ; Trask 

 River, Tillamook, Oregon, Hozvell, Henderson, 



Carex ccsspitosa, L., does not occur in America, so far as 



known. I inserted it in my Synopsis (1886, p. 80), upon the 



authority both of Drejer (Greenland), and Dr, Boott. The plant 



o 



