Alaska trees and shrubs by Leslie A. Little, Elbert L. Viereck

By Leslie A. Little, Elbert L. Viereck

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Red alder (Alnus rubra) II. Cones less than 1/2 in. ) long ____________________ ____________________ 54. thinleaf alder (Alnus tenuifolia) GG. Winter buds not stalked, composed of overlapping scales; fruits not conelike. J. Winter buds 1/4 in. ) or less in length; bud-scales with few or no hairs. K. Twigs with many small whitish dots (lenticels and resin); bark papery, peeling off ____________________ ___________ 50. paper birch (Betula papyrifera) KK. Twigs with few inconspicuous dots (lenticels); bark not papery.

Winter buds sharp-pointed, purple; twigs slender, reddish purple, shiny, hairless, without short side twigs or spurs ____________________________________ __ 72. Pacific serviceberry (Amelanchier florida) JJ. Winter buds large, usually more than 3/8 in. ) long; inner exposed bud-scales densely hairy mountain ash (Sorbus). M. Winter buds with whitish hairs. N. Winter buds reddish brown, inner scales with whitish hairs at tip __________________________________________ ___ 67. Greene mountain-ash (Sorbus scopulina) NN.

Sitka alder (Alnus sinuata) Page 29 HH. Cones with short stalks less than 1/2 in. ) long. I. Cones 1/2-1 in. ) long _______________________ ________________________________ 53. red alder (Alnus rubra) II. Cones less than 1/2 in. ) long ____________________ ____________________ 54. thinleaf alder (Alnus tenuifolia) GG. Winter buds not stalked, composed of overlapping scales; fruits not conelike. J. Winter buds 1/4 in. ) or less in length; bud-scales with few or no hairs. K. Twigs with many small whitish dots (lenticels and resin); bark papery, peeling off ____________________ ___________ 50.

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