132 
C. arvense L. 
Common in rather dry, upland prairie openings. Found in flower from 
mid- June to the latter part of July, and with a few late flowers August 20. 
Near Heart (Raup) lake, No. 2290; near Mission Farm, No. 2293; 
Pine Lake district, Nos. 2291, 2294; base of eastern slope of Caribou moun- 
tains, No. 2295. 
Arenaria lateriflora L. Maekringia lateriflora (L.) Fenzl. See Rhod. six, 259 (1917). 
Common in shady woods throughout the area. Collected in flower 
between the middle of June and the middle of July. Fruit probably 
matures in late July or early August, though none is found in the writer's 
collections. 
East shore of lake Mamawi, No. 2286; 30th base line district, Slave 
river, Nos. 684, 685; Fort Smith, No. 683; Pine Lake district, Nos. 2280, 
2281; Moose (Eight) Lake district, No. 2279; base of eastern slope of 
Caribou mountains, Nos. 2283, 2284; eastern edge of Caribou Mountain 
plateau, No. 2285. 
A. dawsottensis Britton. A. litorea Fernald. See Mem. Am. Acad, xv, 279 (1925). 
Sandwort. 
Occasional in upland meadow openings and muskegs, and in rock crev- 
ices. Collected in flower June 20, and in fruit during August. 
East shore of lake Mamawi, No. 2288; Pine Lake district, No. 2287; 
sink-hole 16 miles east of Moose lake, No. 2289. 
Spergularia salina J. and C. Presl. S. marina Griseb. in Gray's Man., 7th ed. Tissa 
salina (Pres].) Greene, See Rhod. xii, 157 (1910) Sand Sfurry. 
Common at the margins of saline flats and brine springs on the Salt 
Plains. Collected in fruit August 19-20. 
Near Heart (Raup) lake, Nos. 2342, 2343; junction of Nyarling and 
Little Buffalo rivers, Russell , No. 72(2). 
Lychnis Drummondii (Hook.) S. Wats. Wahlbergella Drummondii (Hook.) Rydb. 
Campion. 
Apparently rare in Wood Buffalo park, and collected thus far only 
in the driest upland prairies. In fruit July 17. 
Peace point, No. 2344. 
' NYMPHAEACEAE 
Nymphozanthus variegatus (Engelm.) Fernald. Nymphaea variegata (Engelm.) 
G. S. Miller. See Rhod. xxi, 187 (1919). Cow Lily, Yellow Water-lily. 
Abundant in shallow lakes, ponds, and sluggish streams. The most 
extensive growth thus far observed by the w T riter is at Moose (Eight) lake, 
where it forms a dense zone 100 feet or more wide along the marshy shores. 
Found in flower in the latter part of June and through July. Fruits mature 
during the latter part of August or later. 
Cree (Mamawi) creek, No. 2350; Murdock Creek district, No. 2347; 
Pine Lake district, No. 2346; Moose (Eight) lake, Nos. 2348, 2349, 2351. 
