92 PROCEEDINGS OF THE AMERICAN ACADEMY 



Date : perigynium rhomboid-obovate or rhomboid-oblong, glabrous, 

 orifice toothed : stigmas two. Habit of C. strigosa, Huds. — Neu- 

 braunfels, Texas, Roemer." 



E. Ferru^tnecE, Tuckerman.Enum. Meth. 12. (Fu%inoscE, Tuckerm. I.e. Frigi- 

 dce, Fries, Summa, 70.) Plants smaller and more slender tlian in the pre- 

 ceding groups ; spikes small, an inch or less long, the upper ones often 

 androgynous ; perigynium tapering into a conspicuous point, often rough on 

 the angles, dark-colored ; bracts conspicuously sheathing; stigmas usually 

 three. — A well-marked and peculiar group. 



92. Carex frigida, Allioni, Fl. Ped, ii. 270. 



C semper virens, Olney, Prelim. Cat. AVheeler's Surv. 

 Varies in the width of the leaves, thickness, and disposition of the 

 spikes. Perigynium sometimes smooth. The American representa- 

 tives of this species are not well understood. — Utah, Cottonwood 

 Canon, Watson 1255? "Pacific slope," Parry^ 347; Oregon, Hall 

 600 and 601, Henderson (Mt. Hood), Howell; mountains about the 

 head of Sacramento River, California, Pr ingle. Watson's 1255 may 

 belong to C. luzidcefolia. 



93. Carex luzul^efolia, W. Boott, Bot. Calif, ii. 250. 

 Distinguished from the last by its stouter culm and usually greater 



height (fifteen to thirty inches), its heavier spikes, and especially by 

 the very numerous, loosely sheathing straw-colored thick and broad 

 radical leaves (one fourth to one half inch broad), and the more leafy 

 bracts. Perhaps a large form of the last. — California, in the Sierra 

 Nevada at high altitudes ; Summit Camp, Dr. Kellogg, Ebbett's Pass 

 and northward. Brewer, nos. 2019, 2131, 1701, Yosemite, Bolander 

 6219 ; S. E. Oregon, Cusick. 



94. Carex luzulina, Olney, Proc. Am. Acad. vii. 395. 

 Distinguished from C. frigida by the aggregated and sessile spikes, 



only the lower being distinct and exserted, and by the very broad- 

 based and short bracts : perigynium apparently less spreading and 

 broader than in C. frigida. — Mendocino City, California, Bolander 

 4740. 



95. Carex gtnodtnama, Olney, Proc. Am, Acad. vii. 394. 



Scales very broad and obtuse or the mid-nerve excurrent, mostly 

 shorter than the perigynium, which is broader than that of C. frigida, 

 very short-beaked and hairy on the upper half. — Mendocino City, 

 California, Bolander 4700. 



96. Carex petricosa, Dewey, Sill. Journ. xxix. 246, f. 70. 

 Founded upon very young specimens ; consequently the characters 



are unknown. Five to eight inches high, rigid, culm smooth : leaves 



