B. N. A. BOUNDARY COMMISSION. 
“ 
POLYGONACER. 
Eriogonum erassifolium, Benth. Wood End, (gravelly hill), June 24, ’74, in flower. 
Eriogonum, Sp. II. Trader’s Road, (dry rocky hill), June 17, ’74, first blossoms. 
Eriogonum, Sp. III. South of Wood Mountain, (dry, clay-bottomed Valley), Jun 
27,74, in flower. 
Eriogonum, Sp. IV. Great Valley, (dry clay banks), September, ’73, in flower. 
Eriogonum, Sp. V. Rocky Mountains, (6,000 feet), August 16, ’74, in flower. 
Oxyra digyna, Campd. Rocky Mountains, (6,500 feet), Aug. 18, 4, past flowering. 
Polygonum amphibium, L. var. terrestre. Lake of the Woods, July 21,73, in 
flower, Traders’ Road, July 15,’74, in flower. Var. aguaticum. Winnipeg 
and N. W. Angle Rd., July 5, ’73, in flower. 
Polygonum hydropiperoides, Mx. Lake of the Wocds, July 10, 73, in flower. 
Polygonum Pennsylvanicum, L. Lake of the Woods, July 8, 73, in flower. 
Polygonum dumetorum, L, Winnipeg and N. W. Angle Road, July 3, 73. Turtle 
Mountain, July 25, both in flower. 
sido cilinode, Mx. Winnipeg and N. W. Angle Rd., July 5, ’73, with ripe 
seed. 
Polygonum tenue, Mx. Lake of the Woods, July 23,73, in flower. Foot Hills of 
the Rocky Mountains, (damp meadow) August 7,’"4, in flower. 
Polygonum aviculare, L. Near Wood Mountain, (clay bank) July 2, 74, in flower. 
Polygonum aviculare, L., var. erectum, Roth. West Butte, (coulée) July 25, 74, in 
flower. 
Rumex salicifolius, Weinm. Red River, June 28, ’73,in flower. South of Wood 
Mountain, June 27, ’74, seed formed. 
Rumex venosus, Pursh. South of Wood Mountrain, (bank of stream) June 27, 74, 
with ripe seed. 
Rumex, Sp. I. Rocky Mountains, (6,500 feet) August 18, ’74. 
ELZAGNACEX, 
Elzagnus argentea, Pursh. Dufferin, June 13, ’73, in flower. Second crossing 
Souris River, June 8, ’74, in flower. South Fork Belly River, August 15, 
berry fully formed. Extends on the forty-ninth parallel, from the extreme 
eastern edge of the prairie to the base of the Rocky Mountains It is not 
common on the Red River Prairie, but frequent on the higher level prairie 
to the east, and abundant westward, especially on the second prairie level, 
forming scattered clumps, where no other shrubs are seen. The plant on 
the plains rarely attains a height of over two to three feet, but near the 
mountains is a large bush, extremely fragrant. 
Shepherdia argentea, Nutt. White Mud River, July 4, ’74, berries half grown. 
Not observed east of Wood Mountain. 
Shepherdia Canadensis, Nutt. Kootanie Pass. August 14, ’74, berries ripe. 
SANTALACEX. 
Comandra umbellata, Nutt. Dufferin (open prairie), June 5, ’73, in flower. Abun- 
dant Garry and N. W. Angle Road, July 3, ’73, past flowering. 
Comandra pallida, D.C. Prairie near Turtle Mountain, June 1, ’74, first blos- 
soms. The first species seems to pass into this form westward. 
EUPHORBIACEA. 
Euphorbia glyptosperma, Engim. South of Wood Mountain (dry clay bank), July 
2, '74, in flower. 


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