. Foundations of botany. ch other. Leaves triangular, with a long taper point 54 FOUNDATIONS OF BOTANY and truncate base, unevenly twice serrate, with rather long, slenderpetioles, which allow the leaves to quiver like those of the scaling off in white strips and layers, but not in nearly aslarge sheets as that of the rarer canoe birch (B, papyrifero). Thecommonest birch of New England. 4. B. alba, L. European White Birch, Cut-leaved tree 50 to 60 ft. high, often with drooping branches. Leavestriangular-ovate, truncate, rounded or somewhat heart-shaped atthe base, not strong
. Foundations of botany. ch other. Leaves triangular, with a long taper point 54 FOUNDATIONS OF BOTANY and truncate base, unevenly twice serrate, with rather long, slenderpetioles, which allow the leaves to quiver like those of the scaling off in white strips and layers, but not in nearly aslarge sheets as that of the rarer canoe birch (B, papyrifero). Thecommonest birch of New England. 4. B. alba, L. European White Birch, Cut-leaved tree 50 to 60 ft. high, often with drooping branches. Leavestriangular-ovate, truncate, rounded or somewhat heart-shaped atthe base, not strongly taper-pointed except in the cut-leaved cultivated from Europe. Resembles No. 3, but haswhiter bark and (the weeping form) much more slender branches. V. ALNUS, Toum. Shrubs or small trees. Leaves petioled, serrate. Flower-buds stalked, appearing the previous season; staminate cat-kins raceraed, drooping, flowers 3-6 in the axil of each bract,subtended by 1-2 bractlets, perianth 4-parted, stamens 4, fila-.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1901
