﻿Mackenzie: Notes on Carex 617 



June 6, 1897 and May 28, 1899 (K. M.); Levasy, Bush 1694, 

 May 18, 1902 (N. Y., K. M.); Grain Valley, Bush 6984, May 24, 

 1913 (K. M.); St. Louis, Glatfelter, May 17, 1894 (K. M.); St. 

 Louis, Eggert, June 14, 1893 (C). 



Kansas: Osborne County, Shear 33, May 19, 1894 (N. Y.)- 

 Oklahoma: Sapulpa, Bush 939, 945, 1005, May, 1895 (C.)- 



. Carex bulbostylis sp. nov. 

 Carex griseavar. globosa Bailey; A. Gray, Man. Ed. 6, 605 (at 



least in part). 1890. 



Cespitose, the rootstocks short, hard, rather slender, the 

 culms 2-3.5 dm. high, central and lateral, slender, erect or ascend- 

 ing, obtusely triangular, smooth or nearly so, strongly purplish 

 tinged at base, exceeding leaves but exceeded by bracts; sterile 

 shoots elongated. Leaves with well-developed blades four to ten 

 to a culm, the blades flat with revolute margins 2.5-3.5 mm. long, 

 mostly 1-2 dm. long, or up to 3 dm. on sterile shoots, the sheaths 

 smooth or nearly so. Staminate spike apparently long-pe- 

 duncled (actually nearly sessile, the uppermost pistillate spike being 

 abortive and with short sheathing bract), 2-3 cm. long, 2.5-3.5 

 mm. wide, the scales obovate-oblong, whitish with green slightly 

 excurrent midrib, reddish brown tinged. Developed pistillate 

 spikes three or four, the lower on erect rough peduncles, the upper 

 scarcely exsert-peduncled, three- to seven-flowered, oblong or sub- 

 orbicular ; bracts leaf-like, strongly sheathing. Scalesbroadly ovate, 

 white-hyaline and reddish-brown tinged, with green midvein ex- 

 serted as long cusp, the body narrower than and about half length of 

 perigynia. Perigynia broadly obovoid, globose in cross-section, 

 4.5 mm. long, 2.5 mm. wide, finely many striate, green, minutely 

 hispidulous when young, rounded at base and apex. Achenes 

 obovoid, triangular, 3 mm. long, 2 mm. wide, yellowish, tapering 

 to a substipitate base, minutely apiculate, jointed with con- 

 spicuously enlarged bulbous base of very short deciduous style; 

 stigmas three, short. 



The conspicuously enlarged style-base is the best technical 

 character to separate this species from its allies, Carex grisea Wahl. 

 and Carex amphihola Steud. The culms are strongly purplish 

 tinged at the base, in this differing from Carex grisea. The short 

 and proportionately broader perigynia also serve to distinguish 

 it from that species, and still more so from Carex amphihola Steud. 



