Notes on Carex— I , 



Kenneth Kent Mackenzie 



The following notes are chiefly the result of an endeavor to 

 name a large amount of material which has accumulated in the 



New York Botanical Garden, and which collectors as a rule have 

 not attempted to name. 



' Carex saximontana sp. no v. 



A tufted, very leafy species, allied to Carex durifolia Bailey. 

 Leaves strongly glaucous, much exceeding the culms, 15-30 cm. 

 l° n g> 3-5 mm. wide, rough on the margins and on the midnerve 

 below; culms leafless or nearly so, from very short to 15 cm. 

 long, triangular, slightly roughened and winged on the lower por- 

 tions, strongly winged above; pistillate flowers 2-5, on a zigzag, 

 triangular, winged rachis, each subtended by a bract, the lower 

 two or three of which are enlarged, leaf-like, saccate, and exceed 

 the inflorescence, being from 7 to 35 mm. long and 2-6 mm. 

 wide ; the upper scale-like, ovate-lanceolate, acuminate, hyaline, 

 shorter than the perigynia ; staminate spike sessile, 3 mm. long, 

 exceeded by the upper perigynium ; perigynium glabrous, the 

 body oblong-orbicular tapering to a stipitate base 0.5 mm. long, 

 and rather abruptly contracted into a short, hyaline, slightly 

 toothed beak less than or barely 1 mm. long, the whole perigy- 

 nium about 4 mm. long, the body being about 2 mm. wide and 

 2.5 mm. long, two of the nerves prominent, the others very incon- 

 spicuous ; achene oblong-orbicular, completely filling the perigy- 

 nium, 3-lined, but otherwise not triangular. 



Readily distinguished from Carex durifolia Bailey {Carex 

 Backii Boott), to which it has been referred, by the glaucous 

 leaves ; by the perigynia, which in C durifolia exceed 5 mm. in 

 length, are oblong-lanceolate and gradually taper into the green- 

 ish, hardly-toothed, stout beak ; and by the upper scales or bracts, 

 which in C durifolia resemble the lower, are green and much ex- 

 ceed the perigynia. The " Carex Backii Boott " of the Rocky 



Mountains. 



Type in Herb. N. Y. Bot. Garden, collected by Carl F. Baker 



439 



