BOTANICAL GAZETTE. 119 
“CAREX APERTA, Boott, var. DIVARICATA, n. var. Differs 
from the typical eastern C. aperta in its greater size, wider 
leaves and looser habit, and especially in its large perigynium 
and very conspicuously divaricate dark scales. C aperta, var. 
B, Boott, Illustr. IV, 132 in part—Colorado, Oregon. Var. 
minor, Olney exsice, is typical C. aperta. 
CaREX CANESCENS, L, var. DUBIA, n. var. Culm stiff, 1° 
high, longer than the long pointed leaves; spikes 3-6, all ap- 
proximate, oblong, 10 20 flowered, light tawny; perigynium 
gradually narrowed into a beak half or more as long as the 
body, minutely rough on the angles above, nerved, about the 
length or a little longer than the scale. C. helvola, Blytt? 
Carex Cat. Bear River Cafion, Utah (No. 1231° King’s Sur- 
Twin Lakes, Colorado. The variety differs from C. canescens 
in its stiffer culm, mostly shorter leaves, oblong and tawny ap- 
rough-angled perigynium. In Wheeler’s Report, p. 277, aft 
No. 1018 “possibly C. canescens, Blytt,” should read ‘‘possibly 
C. helvola Blytt.” 
CAREX VESICARIA AND ITS ALLIES. 
the amount of material accumulates. The distinction between 
it and C. monile Tuckm., is small and in some cases is well nigh 
impossible to make out. Forms of C. monile frequently occur 
with a narrow and gradually beaked perigynium scarcely differ- 
ent from the European C. vesicaria, The perigynium appears 
always to differ from that species in texture and color, characters 
which can not be communicated in print. The following char- 
acters are given as aids to the present determination of five of 
the most perplexing species of the Vesicaric : 
*Staminate spike one, rarely two; pistillate spikes short, 
erect ; stigmas usually two; plants small. 
C. SAXATILIs, Linn., Fl. Lapp. 259. Sp. Plant. 976 in part. 
Stoloniferous ; culm 4’-12’ high, sharply angled, about the length 
of or a little longer than the narrow and sharp-pointed leaves ; pis- 
tillate spikes one to three, the upper sessile or nearly so, the lower 
. more or less peduncled,-all dark purple, or at maturity 
coming brown ; bracts narrow, Ska pointe, shorter or a very 
