270 Mackenzie : Notes on Carex 



J.M. 



the group near the Pacific coast. Its oblong-ovate black scales 

 and long (4 mm.) lanceolate perigynia readily distinguish it. 

 Specimens examined : 



British Columbia : Chilliwack Valley, 4000 ft. 



33,728, July 12, 1 901. 



Alaska: On bluffs along Yes Bay , Howe// 1 7 03 A , July 16,1895. 



Washington : Horse-Shoe Basin, Okanogan County, 5000 ft., 

 A. D. E. Elmer 684, September, 1897. 



Carex scirpiformis sp. nov. 



Culms 2.5-4.5 dm. high, aphyllopodic, from matted or short- 

 creeping slender or stoutish rootstocks, the culms from slender to 

 stout, strongly roughened on the angles above, much exceeding 

 the leaves, reddened at base. Leaves with well-developed blades 

 usually 3-6 to a fertile culm, on the lower third but not clustered, 

 the sheaths long-overlapping, hyaline, brownish-tinged and puberu- 

 lent opposite the blades, the blades ascending, flat, 2-3 mm. wide, 

 5-20 cm. long, roughened towards the apex ; culms dioecious, 

 the spike erect, solitary or rarely with a small additional one at 

 base ; staminate spike not seen, the pistillate linear, 2—4 cm. long, 

 4-5 mm. wide, with a rudimentary or elongated bract 3 cm. or 

 less long at or somewhat below the base, its sheath somewhat 

 darkened, little sheathing ; scales ovate, strongly pubescent and 

 ciliate at apex, brownish with broad white-hyaline margin and 

 lighter center, obtuse or acute, as wide and nearly as long as 

 perigynia; perigynia numerous, greenish or yellowish-brown, hir- 

 sute, 2.5 mm. long, 1.25 mm. wide, the body ovate-oval, obscurely 

 triangular, tapering to a substipitate base, abruptly contracted at 

 apex into the minute entire beak (0.5 mm. long) ; achenes triangu- 

 lar, 1.75 mm. long; stigmas three. 



This plant is more closely related to C. scirpoidca than are 

 any of the other plants here discussed. The contrast, however, 

 between the long scales of this species with their broad hyaline 



margins, and those of C. scirpoidea with nearly no margin 



and 



usually much shorter than the perigynia, is so marked and con- 

 stant in the specimens examined that I feel justified in proposing 

 the species. 



Specimens examined : 



Alberta : Banff, damp ground near Middle Spring, 47°° 

 McCalla 2348, July 28, 1899. (Type in herb. N. Y. Bot. Gar- 

 den) ; near Banff, Macoun, June 30, 1891 (in part); Rocky Mfc 

 Park, John Macoun 64054, July II, 1904. 



