•# 



55 



was unable to find Wahlenberg's original, but it was probably 

 the same collection as Schkuhr had, as Wahlenberg appears 

 to have obtained many of his American plants through Willd- 

 enow and Schkuhr. Schkuhr's fig. 177 cannot pass for any 

 A other species than the one under consideration, howevef, and 



Wahlenberg says (Fl. Lapp. 250) that his species is the same as 

 this figure. 



In order to properly understand C. trihicloides, it is necessary 

 to throw its variations into two series, as follows: 



I. — Heads green or greenish. 



Var. CRISTATA, Bailey, Proc, Amcr. Acad. Arts and Sci. 



xxii. 148 (1886). 

 C. cristata, Schw. Ann. N. Y. Lye. Nat Hist. 66 (1824), v. s, 



Hb. Schw.; Boot't, III. t 372 (1862). 

 C. straijiiiica^ var. cristata, Tuckm. Enum. Meth. 18. (1843). 

 C, lagopodioides^ var. cristata, Carey, Gray's Man. 1848, 545 ; 

 I Olney, Exsic. fasc. i. No. 7 (1871), v. s. 



Tall and stout; head stout and erect, more or less continuous, 

 composed of several to many globular dense spikes; perigynium 

 long-pointed and spreading, giving the spikes a cristate appear- 

 ance. Pennsylvania to New England and westward to Iowa. 



V 



/ Var. TURBATA. 



C, tribidoides, Herb. Unio Itin. No. 204 (1837), v. s. Hb, 

 Berol. 



C. lagopodioides, van, Boott, 111. t. 371, f. i (1862). 



Plant slender and lax; head an inch or two long, loose. 



slender, mostly greener than hi the last ; spikes obovate-oblong 



to rarely % inch long), contracted below, the lower ones 

 usually distinct or even alternate, becoming tawny, if at all, only 

 when the perigynia begin to fall ; perigynium ascending, the 



points not conspicuous. Shady copses and woods, Massachusetts 



i> 



Moh) 



Langlois. Evidently not common. 



II. Heads tawny or brown- 



/ Var. Bebbil 



C, Bcbbii, Olney, Exsicc. fasc. ii. No.- 12 (1871), v, s. 



Head dense, ovoid or oblong, short (^ to ^ inch long, or 

 rarely an inch), the lower spike only rarely distinct; spikes small 



