52 Th. Holm. 
although it shows some approach to C. acutina, though merely in respect 
to its habit We have examined a number of specimens and are unable 
to refer the plant to either of those mentioned above. 
4. Carex eurycarpa Holm, |. c., p. 303, fig. 9—10. 
Rhizome stoloniferous with persisting, brown leaf-sheaths and strong 
roots; leaves half as long as the culm, narrow (3 mm), carinate, light 
green, scabrous along the keel and margins; culm 60 cm in height, erect, 
slender but somewhat stiff, scabrous, triangular, phyllopodic; spikes 3 
to 5, mostly 5, the terminal and, sometimes, the uppermost lateral stami- 
nate, the others purely pistillate, all remote; the pistillate short-peduncled, 
erect, dense-flowered except towards the base, until 5 cm in length, 
cylindric, but relatively thin, subtended by narrow, sheathless bracts, 
about as long as the inflorescence; scale of staminate spike oblong, ob- 
tuse, light brown with pale midvein and narrow, hyaline margins; scale 
of pistillate spike lanceolate, acute, blackish with pale, not excurrent, 
midvein, narrower, but about as long as the perigynium: perigynium 
sessile or nearly so, erect, roundish, granular, slightly plano-convex, pro- 
minently many-nerved on both faces, brownish, the beak short, emargi- 
nate; stigmata 2. 
Washington: W. Klickitat County, Falcon Valley, collected by Mr. 
W. Suksdorf, June, 1886 (no. 1284 and 2962). 
5. Carex oxycarpa Holm, |. c., p. 303, fig. 11—12. 
Rhizome stoloniferous with strong roots and persisting, brown leaf- 
sheaths; leaves a little shorter than the culm, narrow (4 mm), carinate, 
light green, scabrous; culm about 75 cm in height, erect, slender, but 
somewhat stiff, triangular, scabrous, phyllopodic; spikes 4 to 5, the ter- 
minal staminate, long-peduncled, the lateral pistillate, contiguous, seldom 
remote, short-peduncled, erect, dense-flowered, cylindric, from 2 to 4 cm 
in length, subtended by sheathless, narrow, foliaceous bracts, the lowes 
one exceeding the inflorescence; scale of staminate spike oblong, obtuse 
light reddish-brown with pale midvein; scale of pistillate spike lanceo- 
late, acute, blackish with pale, not excurrent midveir, narrower, but 
about as long as the perigynium; perigynium sessile, broadly elliptical, 
granular, compressed, prominently 3-nerved, brownish, prominently denti- 
culate along the margins from near the base to the short, emarginate 
beak; stigmata 2. 
Washington: W, Klickitat County, meadows near the Columbia, 
collected by Mr. W. Suksdorf, June, 1885 (no. 816). 
Of these C. eurycarpa is a very slender plant and much more so 
than any of the numerous specimens of C. Nebraskensis, which we have 
studied. The broad perigynium with the beak merely emarginate con- 
stitutes, also, a good distinction. In the other, C. oxycarpa, we have, 
also, a plant of slender habit, but the spikes are relatively heavy, and 
the perigynium is here merely 3-nerved and with the margins quite 
prominently denticulate from the base to the emarginate beak. 
