By Leslie A. Little, Elbert L. Viereck
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Extra info for Alaska trees and shrubs
Leaves scalelike, usually less than 1/8 in. ) long, crowded, forming fanlike or flattened sprays. M. Leafy twigs flattened; leaves flattened and curved, not spreading _______ 11. western redcedar (Thuja plicata) MM. Leafy twigs 4-angled or slightly flattened; leaves pointed, spreading _______________________________________________ _______ 12. Alaska-cedar (Chamaecyparis nootkatensis) AA. Leaves broad and flat, shedding in fall (deciduous); trees non-resinous; seeds developed from a flower and enclosed in a fruit flowering plants (angiosperms).
Bush cinquefoil (Potentilla fruticosa) II. Stipules and bases of petioles absent. K. Fruits persistent in conspicuous clusters. L. Fruits fleshy, like a small apple, red; winter buds large, mostly more than 3/8 in. ) long, with densely hairy inner bud-scales; large shrubs and small trees mountain-ash (Sorbus). M. Winter buds with whitish hairs. N. Winter buds reddish brown, inner bud-scales with whitish hairs at tip ____________________ 67. Greene mountain-ash (Sorbus scopulina) NN. Winter buds densely covered with whitish hairs; naturalized tree _______________________ 68.
Latifolia) EE. Needles single, without sheath at base. G. Older twigs roughened by projections where needles were shed. H. Needles sharp-pointed, stiff, without leafstalks spruce (Picea). I. Needles 4-angled. J. Twigs hairy; needles mostly less than 1/2 in. ) long, resinous; cones egg-shaped or nearly round, mostly less than 1 in. ) long, curved down on short stalks, remaining on tree __________ 4. black spruce (Picea mariana) JJ. Twigs hairless; needles more than 1/2 in. ) long, with skunklike odor when crushed; cones cylindric, 1 1/4-2 1/2 in.
Alaska trees and shrubs by Leslie A. Little, Elbert L. Viereck