147 
A. hvpoglottis L. Purple Milk Vetch. 
Common in semi-open prairies on the upland. Collected in flower 
June 15, and in fruit July 19 and August 3. 
Near Mission Farm, No. 2768; Peace point, Nos. 2767, 2769; junc- 
tion of Nyarling and Little Buffalo rivers, Ricssell, No. 5. 
A. alpinus L. Tmm alpiuum (L.) Rydb. Alpine Milk Vetch. 
Common in upland woods and prairies. Also found in burned areas 
and muskeg thickets. In flower during the latter half of June and early 
July. Mature fruit collected in the latter part of July and early August. 
Near Heart (R,aup) lake, No. 2775; Fort Smith, Nos. 994 (coll. Mrs. 
Conibear), 995; Pine Lake district, Nos. 2771, 2772, 2773, 2774; Moose 
(Eight) Lake district, No. 2770; base of eastern slope of Caribou moun- 
tains, Nos. 2776, 2777 ; Lobstick creek, Russell , No. 4. 
A. eucosmos B. L. Robinson. 
Rare or occasional, and collected thus far only on an island flood- 
plain in upper Slave river. Young flowers were developing on June 18. 
30th base line, Slave river, No. 991. 
A. frigidus (L.) Gray, var. amerieanus (Hook.) S. Wats. Phaca americana (Hook.) 
Rydb. Arctic Milk Vetch, Rattle-pod. 
Common in open woods and muskeg thickets throughout the area. 
It is occasionally found in semi-open prairies, but is probably commonest 
in open aspen woods. Young plants not yet in flower collected June 20, 
and early flowers late in June and early in July. Immature fruits may be 
found in the latter half of July, and mature ones in early August. 
Government Hay Camp district, Slave river, No. 2760; Pine Lake dis- 
trict, Nos. 2757, 2758; Peace point, Nos. 2759, 2761; Moose (Eight) Lake 
district, Nos. 2752, 2753, 2754, 2755, 2756; base of eastern slope of Cari- 
bou mountains, Nos. 2762, 2763, 2764, 2766; eastern edge of Caribou 
Mountain plateau, No. 2765. 
A. tenellus Pursh. Homalobus tenellus (Pursh) Britton. 
Apparently rare in Wood Buffalo park, and collected thus far only on 
the Peace Point prairie, where it had both flowers and fruit July 17 to 19. 
Peace point, Nos. 2780, 2781. 
Oxytropis splendens Dougl. Locoweed. 
A large part of the writer’s material may possibly be placed in var. 
Richardsonii , but the value of this variety is rather doubtful when a large 
series of intergrading specimens is taken into consideration. Therefore, 
pending further study, they have been classified as above. 
Common in dry upland prairie openings and on sandy ridges. Ros- 
ettes are just getting started in the middle part of June, and early flowers 
are formed during the second w^eek in July. Flowering appears to be at 
its height in the latter ha]f of July, and fruits are matured in mid- August 
and later. Other species of this genus are known to be poisonous to stock, 
causing the disorder known as “ loco,” but no definite records are available 
for the one here listed. 
