170 
A. biennis Willd. 
Occasional in clearings, meadows, and on stream banks. It flowers 
in the latter half of August. 
Reed portage, upper Embarras river, No. 3343; near Heart (Raup) 
lake, No. 3341; sink-hole 16 miles east of Moose lake, No. 3342. 
A. frigida Willd. Pasture Wormwood. 
Common on very dry prairies and on granite hills. Flower buds appear 
in the latter part of July, and flowers in August, 
East shore of lake Mamawi, No. 3335; Peace point, Nos. 3336, 3337. 
Petasites palmatus (Ait.) Gray. Coltsfoot. 
Common in open (chiefly poplar) woods throughout the upland. 
Flowering and fruiting stems found in late June and early July, 
Fort Smith, No, 1435; Pine Lake district, Nos. 3403, 3404, 3405; 
Moose (Eight) Lake district, No. 3402; base of eastern slope of Caribou 
mountains, No. 3401; eastern edge of Caribou Mountain plateau, No. 3400. 
P, vitif alius Greene. 
Common in upland muskegs and wet meadows. Immature fruit col- 
lected June 20. 
Near Heart (Raup) lake, Nos, 3406, 3407; Pine Lake district, No. 3408; 
Moose (Eight) Lake district, No. 3409; base of eastern slope of Caribou 
mountains, Nos. 3410, 3411. 
P. sagittatixs (Pursh) Gray. 
Abundant in muskegs and wet meadows throughout the region. 
Flowering and fruiting stems collected during the latter half of June. 
Government Hay Camp district, Slave river, No. 3415; near Heart 
(Raup) lake, No. 3413; near Mission Farm, No. 3416; Pine Lake district, 
No. 3414; Moose (Eight) Lake district, Nos. 3417, 3418, 3419; base of 
eastern slope of Caribou mountains, No. 3420; Clewi river, Russell , No. 15. 
Arnica rhizomata A. Nels, Arnica. 
Common at the margins of some of the upland semi-open prairies. It 
usually grows around the willow clumps in such places, and flowers in the 
latter part of July. 
Peace point, No. 3378; base of eastern slope of Caribou mountains, 
Nos. 3379, 3380, 3381, 3382, 
A. chionopappa Femald. See Rhod. xxxv, 336-7 (1933). 
Common in dry upland woods and on rocky hills. Found in flower 
in the latter part of June and in July. Fruiting heads appear in August. 
Government Hay Camp district, Slave river, No. 3377; Fort Smith, 
No. 1408; Pine Lake district, Nos. 3373, 3374, 3375; sink-hole 16 miles 
east of Moose lake, No. 3376; lower Slave river, No. 1409. 
Senecio eremophilus Richards. 
Collected thus far only in lowland clearings and hay meadows, where 
it is common. Found in flower during the first half of August. 
