104 PROCEEDINGS OF THE AMERICAN ACADEMY 



eight inches high, erect, setaceous, scarcely angled, striate, smooth, 

 few-leaved towards the base: leaves somewhat remote, spreading, 

 much shorter than the mature culm, somewhat pubescent, acuminate, 

 plane, the margins towards the apex minutely dentate, half to two 

 thirds of a line wide and two to three and a half inches long : spikes 

 four or five, pale, long-peduncled, very remote, narrowly cylindrical, 

 nearly equal in length, three and a half to four and a half lines long, 

 scarcely a line broad above, the terminal one androgynous, the others 

 pistillate and pendulous : peduncles very slender, somewhat scabrous : 

 bracts ochreiform : scales hyaline-membranaceous, ochroleucous, ovate- 

 orbicular, obtuse, the midnerve bright green : perigynium minute, 

 straight, pellucid-membranaceous, olive-colored, about as long as the 

 scale (one and a third to one and a half lines long), very shortly 

 stipitate, oblong-trigonous, attenuated above, nerveless, smooth, very 

 slightly striate, the orifice entire." — Alaska, Krause. 



D. Dehiles, Carey, Gray's Man. 1848, 558. Terminal spike all staminate (occa- 

 sionally pistillate above in C. venusta) ; pistillate spikes very narrow and 

 slender, long-exserted and nodding, mostly very loosely flowered; perigy- 

 nium rather small, not turgid. The types of the group are C. debilis and 

 C. arciata. 



128. Carex juncea, Willd. Enum. PI. Hort. Berol. 63. 

 C. miser, Buckley, Sill. Journ. xlv. 173. 



Transition to the Ferruginece. — Roan Mt. and Black Mt. Range, 

 N. Carolina, Herh. "Mountains of N. Carolina and Georgia," Boott. 



129. Carex arctata, Boott, Hook. Fl. Bor.-Am. ii. 227. 

 C sylvatica, Dewey, Sill. Journ. x. 40. 



Distinguished from all forms of C. debilis by its short-ovate very 

 short-beaked perigynium which is abruptly contracted at the base and 

 stipitate, and by its jDointed or short-awned scales which are nearly 

 as long as the perigynium. The radical leaves are usually short and 

 broad. — Meadows and copses, New England to Pennsylvania and 

 Ontario and Michigan, and northwestward to N. Minnesota and Dakota 

 " along the Missouri at Fort Pierre," Dewey. 



C. arctata X FORMOSA ? ( C. Knieskernii, Dewey, Sill. Journ. 2d 

 ser. ii. 247). New York at Oriskany, Knieskern, Rome, Vasey ; 

 Woods near Kakabeka, Lake Superior, Macoxm. Sterile. 



130. Carex debilis, Michx. Fl. Bor.-Am. ii. 172. 

 C. tenuis, Rudge, Linn. Trans, vii. 97, t. 9. 



C. flexuosa, Muhl. ; Willd. Sp. PI. iv. 297 ; Schkuhr, Riedgr. 



Nachtr. 74, f. 124. 

 C. debilis, var. /3, Boott, 111. 92. 



