206 BOTANICAL GAZETTE. 
side of the perigynium beneath the achenium. A careful dissec- 
tion of the perigynium at once reveals this distinction. ¢. mi: 
croglochin is also smaller than OC. pauciflora, the perigynium Is 
less spindle-shaped and more strongly reflexed. Hall and 
bour’s specimens are larger than the European and Greenland 
specimens, and it was probably due to this fact that Dr. Boot 
referred them to the very similar C. oligantha. I do not know 
that C. pauciflora occurs in the United States west of the Mis- 
sissippi, but Drummond collected it in the Rocky Mountains of 
ritish America. ‘ 
5. CAREX GLoBosa, C. umBELLATA and C. Rossi have 
been endlessly cunfounded at the West. After a careful study 
of many specimens from all parts of the West, the following — 
characters appear to be genéral and decisive: 
C. eLososa, Boott, Trans. Lin. Soc. XX, 125. Rootstock 
woody, mostly perpendicuiar, or nearly so; culm one, slender, 
angled and scabrous, 6 to 12 inches high; leaves many, broad (2 
lines wide), upright, mostly flat or flattish, usually exceeding the 
culms ; staminate spike $ to 1 inch long, conspicuous; pistillate spikes 
usually several, 2 to 8 flowered, the upper one borne at or near 
base of the staminate spike, the remainder on very slender radical or 
sub-radical peduncles; perigynium pear shaped (rarely nearly & 
liptic) very gradually tapering from a rounded summit into astipitate 
very strongly-nerved base, sparsely hirsute, the short, straight bed 
slightly toothed.—California ; Nuttall; Bolander, Nos. 20, 220 
and 6196; Brewer, No. 303. ‘ 
C. uMBELLATA, Schk. Riedgr. II, 75. Rootstock: mostly 
and con- 
more 
perigynium globose elliptic, more or less flattened, nerveless % 
nearly so, tightly enclosing the achenium, clothed with sparse," 
hairs (rarely smooth), margined by two prominent ridges WN" 
terminate in a flattened, sharply cut beak as long a8 the toe 
—Frequent on dry, sandy soil throughout the Northern States@ 
of the Mississippi and northwestward to the Rocky Mount” 
of British America ; also in Indian Territory. “1 ghortet 
Var. BREVIROsTRIs, Boott, Ilustr. 11, 99. Beak much 8 3. 
and minutely toothed, the perigynium rounder or somewhat °° 
