June 3, 1908 © | 45 
Sheaths glaucescent, teeth appressed, black, slenderly acuminate, 
provided with o{ longitudinal dorsal sulcus, the margin white- 
membranous. 
Near &. arvense 1,. from which it differs: the branches tri- 
quetrous (not tetragonal), the smooth (not scabrate) teeth of the 
sheaths at length longer, firmer, altogether black. 
Also brought from the island of Aliaschka; but always 
sterile. 
CAREX MERTENSII Prescott, 168. Spikes 4-7, male an- 
drogyna approximate below linear pendulous; stigmas 2; peri- 
gonia ovate-lanceolate, compressed, membranaceous, the apex 
entire, longer and broader than the lanceolate scale. 
Near C. atrata, from which it differs: greater stature, 3-4 
feet; spikes linear; the thin texture of the perigonia, nearly 
hyaline and their apices entire, not bidentate. 
CAREX SITCHENSIS Prescott 169. Male spikes several, 
erect, the female pedunculate, nodding in fruit; stigmas 2; peri- 
gonia obovate, compressed, beaked, the apex entire, shorter than 
the lanceolate scale, which is attenuate and involute at the apex. 
Habit partly of C. acuza, and partly of C. paludosa; from 
all of which it differs: scales of the fruit involute, sphacelate at 
apex: 
STELLARIA BRACHIPETALA 126. Stem simple, erect, leaves 
shortly linear-lanceolate, petals twice shorter than the capsule 
and calyx. 
Stem simple, erect, tetragonal, glabrous, smooth, a foot and 
a half high. Leaf sessile, erect, linear-lanceolate, acuminate, 
very glabrous, margin entire, smooth; short, 1-1 % inches, about 
4 lines broad at the middle, shorter than the internodes. Cyme 
dichotomous. Peduncles elongated, reflexed in fruit. Sepal 
lanceolate-acuminate, the margin white-scarious, concave three- 
nerved, twice longer than the petals. Petal white, two-parted 
nearly to the base; the lobes oblong. Stamen as long as the 
petals. Anthers elliptical, yellow.. Styles 3. Capsule ovate, 
a little shorter than the calyx. 
