•J68 Mackenzie : Notes on Carex 



Scales very broadly hyaline-margined ; perigynium 



yellowish-hirsute. G scirpiforviis. 



Culms phyllopodic, the culm-leaves usually 6-10 ; 



scales concealing perigynia. C.pseitdoscirpoidea. 



Descriptions of the new species and the varieties here raised to 

 specific rank follow : 



' Carex gigas (Holm) sp. nov. 



Carex scirpoidea var. gigas Holm, Am. Journ. Sci. IV. 17: 21. 1904. 



Culms 3-4.5 dm. high, phyllopodic, from densely matted stout 

 rootstocks, the culms stoutish, roughened on the angles above, 

 much exceeding the leaves, reddened and somewhat filamentose at 

 base. Leaves with well-developed blades 5- 10 to a fertile culm, 

 clustered near the base, the sheaths hyaline opposite the blades, 

 brownish-tinged and minutely puberulent, the blades ascending, 

 flat, 2.5 mm. wide, 5-15 cm. long, roughened towards the apex; 

 culms dioecious, the spike erect, normally solitary ; staminate 

 spike not seen, the pistillate (terminal) linear, 1.5-2.5 cm. long, 

 4-6 mm. wide, with an ovate short-pointed scale-like bract at base, 

 and an elongated (2-4 cm. long) bract 1-3 cm. below, its sheath 

 slightly darkened and little (1-3 mm.) sheathing, often with a 

 smaller peduncled spike in its axil ; scales oblong-ovate, glabrous, 

 brownish with lighter midrib and narrow hyaline margin, acute or 

 obtuse, as wide as the perigynia and of about the same length ; peri- 

 gynia numerous, black, 3 mm. long, 2 mm. wide, the body broadly 

 oval, flattish, rounded at base, rounded at apex and very abruptly 

 contracted into the minute bidentate beak (0.5 mm. long), minutely 

 puberulent above and pubescent on the angles ; achenes triangular, 

 2 mm. long ; stigmas three. 



This species, as yet known only from northern California, has 

 a perigynium entirely different from that of any other member 01 

 this group, and is clearly entitled to be treated as a species. 



Specimens examined : 



California: Siskiyou County, 8,000 ft, Pringle, August 18, 



1881. 



^ Carex scabriuscula sp. nov 



Culms about 3 dm. high, phyllopodic, from stout short-creep- 

 ing rootstocks, the culms stoutish, roughened on the angles above, 

 much exceeding the leaves, somewhat reddened at base. Leaves 

 with well-developed blades 5-10 to a fertile culm, clustered near 

 the base, the sheaths hyaline, brownish-tinged and minutely puber- 

 ulent towards the apex opposite the blades, the blades ascending. 

 flat, 2-3 mm. wide, 6-12 cm. long, roughened towards the apex, 

 culms dioecious, the spike erect, normally solitary ; staminate spike 



