Plate XXXIII.—Betula populifolia.
| 1. Branch with sterile and fertile catkins. |
| 2. Sterile flower, back view. |
| 3. Fertile flower. |
| 4. Scale of fertile flower. |
| 5. Fruiting branch. |
| 6. Fruit. |
Betula papyrifera, Marsh.
Canoe Birch. White Birch. Paper Birch.
Habitat and Range.—Deep, rich woods, river banks, mountain slopes.
Canada, Atlantic to Pacific, northward to Labrador and Alaska, to the limit of deciduous trees.
Maine,—abundant; New Hampshire,—in all sections, most common on highlands up to the alpine area of the White mountains, above the range of the yellow birch; Vermont,—common; Massachusetts,—common in the western and central sections, rare towards the coast; Rhode Island,—not reported; Connecticut,—occasional in the southern sections, frequent northward.
South to Pennsylvania and Illinois; west to the Rocky mountains and Washington on the Pacific coast.