115 
C. atratiformis Britton. 
Occasional in upland muskeg thickets. Immature fruit found July 
11, and mature fruit during August. 
Along trail about 10 miles southwest of Fitzgerald, No. 1942; Pine 
Lake district, No. 1941; Moose (Eight) Lake district, Nos. 1939, 1940. 
C. aqua tilis Wahl. Wateb Sedge. 
One of the commonest sedges oe wet sandy or marshy shores through- 
out the region, often forming broad bands of bright green around slough 
ponds. Its long, active rootstock makes it one of the most prominent 
colonizers in such habitats. It is occasionally eaten by the buffalo, prob- 
ably for the most part in the early, succulent stages of its growth. Col- 
lected in flower during the first half of June, and in fruit during August. 
East shore of lake Mamawi, No. 1841; along Quatre Fourches river, 
No. 338; Murdock Creek district, No. 1842; Government Hay Camp dis- 
trict, Slave river, Nos. 1847, 1848; near Heart (Raup) lake, No. 1849; 
Pine Lake district, Nos. 1843, 1845, 1846; sink-hole 16 miles east of 
Moose lake, No. 1854; Moose (Eight) Lake district, Nos. 1850, 1851, 
1852, 1853; base of eastern slope of Caribou mountains, No. 1840. 
C. trichocarpa Muhl., var. arislala (R.Br.) Bailey. C, atherodes Spreng. Meadow 
Sedge. 
One of the most abundant sedges in Wood Buffalo park. Although 
it occurs in a variety of habitats throughout, ranging from lake shores 
where it stands in 4 feet of water, to nearly dry sloughs, it reaches its 
greatest abundance in the wet meadows of the lowland deltas and aban- 
doned stream channels. In the latter situations it covers many square 
miles, in the aggregate, with a nearly pure stand, and has been for many 
years a source of wild hay. It also forms 1 one of the most important 
sources of autumn and winter feed for the buffalo. It is probable that 
the small winter buds that occur at the base of the current year’s growth 
of each plant, and often at the end of a decumbent stem or off-set, make an 
essential source of nutriment to these animals during the winter. Imma- 
ture fruits have been collected from late June through July, and mature 
fruits during August. Over large areas in the lowland meadows the 
plants seldom produce flowers and fruit, apparently reproducing entirely by 
vegetative means. It is suggested that this may be due to continued 
i( pruning ” of the winter buds by the grazing buffalo. 
Cree (Mamawi) creek, No. 1857; lower delta of Athabaska river, 
No. 317; east shore of lake Mamawi, No. 1858; Murdock Creek district, 
No. 1861; Government Hay Camp district, Slave river, Nos. 1860, 1862- 
Pine Lake district, No. 1864; near Round lake, about 18 miles south of Pine 
lake, No. 1859; Peace point, No. 1863; Moose (Eight) lake, No. 1865; 
base of eastern slope of Caribou mountains, Nos. 1855, 1856. 
C. rostrata Stokes. 
An extremely variable species found at the margin of nearly every 
slough pond in the region. It usually stands with the bases of the stalks 
in water, and forms bright green bands around the wetter parts of the 
sloughs. Usually found in flower during July and in fruit during August. 
Cree (Mamawi) creek, No. 1828; Murdock Creek district, No. 1834; 
Government Hay Camp district, Slave river, Nos. 1830, 1838; Pine Lake 
