374 B. N. A. BOUNDARY COMMISSION. 
Pinus Resinosa, Ait. Lake of the Woods. 
Thuja occidentalis, L. Lake of the Woods, Roseau River, &c. 
Juniperus Virginiana, L var. procumbeus, Hook. Lake of the Woods. 
Pinus contorta, Dougl. var. latifolia, Eng. Kootanie Pass. Very abundant. 

ARACEZ, 
Acorus Calamus, L. Lake of the Woods. 
Arisema triphyllum, Torr. Dufferin, July 6, ’73, in flower. 
Calla palustris, L. Winnipeg and N, W. Angle Road, July 5, ’73, in flower. 
TYPHACER. 
Sparganium eurycarpum, Eng. Lake of the Woods, August 5, ’73, in fruit. 
Sparganium natans, L, Lake of the Woods, August 1, ’73, in flower. 
. Typha latifolia, L. Lake of the Woods. 
LEMNACEAL. 
Lemna trisulca, L. Small lakes. Red River prairie. Lake of the Woods. 
Lemna minor, L. Common in the same localities. 
NAIADACES. 
Potamogeton pusillus, L. Lake of the Woods, July 8, ’73, in flower. 
Potamogeton natans, L. Lake of the Woods, August 1, ’73, in flower. 
Potamogeton perfoliatus, L. Lake of the Woods, July 8, ’73, in flower. 
ALISMACEA. 
Alisma plantago, L. Winnipeg and N. W. Angle Road, July 4, '73. Turtle 
Mountain, July 25, ’73, both in flower. 
Sagittaria variabilis, Eng. Lake of the Woods, July 30, ’73. S. Antler Creek, 
July 31,’73. Wood End, July 13,’74. All in flower. . 
Triglochin maritimum, L. Near Wood Mountain, border of saline pool, July 9, 
'74, in flower. 
Triglochin palustre, L. Var. elatum, Nutt. Winnipeg and N. W. Angle Road. 
ORCHIDACEA, 
Calopogon pulchellus, Brown. Winnipeg and N. W. Angle Road, July 5, ’73, in 
flower. 
Cypripedium pubescens, L. Dufferin, June 13, ’73, in flower. 
Platanthera hyperborea, Lindl. Lake of the Woods, thicket, July 8, ’73, in flower. 
Platanthera psycodes, Gray. Lake of the Woods (grassy swamps), July 20, ’73, in 
flower. 
Platanthera bracteata, Torr. Eastern border of Red River prairie, June 20, '73, in 
flower. Pembina Mountain, May 27, ’74, first blossoms. 
Spiranthes cernua, Richard. Lake of the Woods, July 20, ’73, in flower, 
AMARYLLIDACE. 
Hypozis crecta, L. Dufferin (damp meadow), June 13, ’73, first flowers. North 
Antler Creek (open prairie), June 6, ’74, first flowers. 
IRIDACEA. 
Tris versicolor, L. Winnipeg and N. W. Angle Road, July 3, ’73, in flower. 
Sisyrinchium mucronatum, Mx. Red River prairie, June ’73. First crossing Souris 
River, June 3, ’74, in flower. 
