20 
Hol m, The genus Carex in North-West America. 
entirely misunderstood, the name erroneously applied to Dewey’s 
unpublished species: magnifica. The species (Sitchensis) shows 
the same habit as C. -acuta, but with the spikes constantly very 
slender, long, peduncled and drooping; it has been collected 
at several stations in Alaska, but is rare in Oregon and 
Washington. An inland type from the mountains of British 
Columbia, Oregon and Washington and which comes very 
near the former (Sitchensis) is C. dives; the spikes, however, 
are of a lighter color 'and the perigynium is pale green with 
scattered purplish spots and streaks, roundish in outline, 
dentic*ulate along the upper margins and with a short, entire beak; 
it has, also, been found in California. 
While frequent in Montana, Dakota, Nebraska, Wyoming, 
Colorado and Utah C. Nehrascensis seems to be rare in our region 
and is absent from Alaska and Yukon; in Washington it is accom- 
panied by C. eurgcarpa and oxycarpa, both of which possess 
strongly ribbed perigynia with the beak emarginate and, in the 
latter, with the margins denticulate. An ally of these is the more 
evolute C. laciniata, a Californian type, which extends to Oregon; 
in this species the perigynium is bidentate and the scales very 
often aristate. 
Among the „förmae desciscentes^^ C. scop)ulorum. so very 
frequent in the Rocky Mountains, has also been found in Washing¬ 
ton and Oregon, while the singulär 0. campylocarpa is only known 
from Oregon. 
As represented in North-West America the Microrhynchae 
contain several interesting types, some^of which are characteristic 
of the region. And some of these correspond well with old world, 
especially European, types and are like these accompanied by 
allies of habital resemblance, but with the squamae and perigynia 
of different color and structure, We have seen that the old world 
C. caespitosa has a homologue in our 0 . prionophylla, that C. vulgaris 
occupies the center of a group surrounded by such types as C. 
limnaea, gymnoclada etc.; the aquatilis-group with C. sphacelata and 
chionophila, the acutina-gvoup with C. interrupta and limnocharis^ 
while the Nehrascensis-growp with C. eurycarpa and oxycaryxi and the 
still more evolute G..laciniata occupy the extreme limits of the 
grex and have no homologues in Europe. 
Carices aeorastachyae. 
The salina-group is represented by C. subspathacea and scduia 
var. cuspidata, which have been collected on the Alaskan coast 
and adjacent Islands; they are, however rare in this region. A type 
intermediate between these and the cryptocarpa-gvowp is the Alaskan 
C. cryptochlaena from Seldovia and Kussiloff; it is a peculiar 
species which resembles C. cryptocarpa so far as concerns the color 
and shape of squamae and perigynia, but lacks its graceful habit, 
the spikes being erect, nearly sessile and. the leaves very broad. 
— Very abundant is, on the other hand, C. cryptocarpa on the 
Alaskan coast and Islands extending to Washington, Oregon and 
British Columbia, and is very variable. Another frequent and 
truly north-western type is C. macrochaeta, which, also, abounds 
