Alaska trees and shrubs - download pdf or read online

By Leslie A. Little, Elbert L. Viereck

ISBN-10: 0585207399

ISBN-13: 9780585207391

ISBN-10: 0912006196

ISBN-13: 9780912006192

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Sample text

Leaves alternate, linear-lanceolate, 1/16-3/16 in. ) long, pointed, without groove on lower surface, often with long hairs on margin; dried capsule often persistent at tip of twig ________ ____ 105. starry cassiope (Cassiope stelleriana) Page 35 HH. Leaves paired or opposite, scalelike, pressed against twig. J. Leaves deeply grooved on lower surface, 1/8-3/16 in. ) long _______________________________ __ 103. four-angled cassiope (Cassiope tetragona) JJ. Leaves not deeply grooved on lower surface, 1/16-5/32 in.

This device is a short cut to save time in reading every description until the one that agrees is found. The species are divided into two groups according to certain distinguishing characters, and each group is divided successively into two smaller groups down to a single species at the end. The name of a particular specimen is found through selection, one by one, of the group in which it belongs. Like an outline, the keys are indented. The two groups forming a pair of contrasting characters are designated by the same letter, single and double, and spaced one directly below the other but usually not together.

G. Shrubs more than 4 ft. ) high; leaves thin, deciduous; twigs and leaves with glandular ("sticky") hairs _________________________ ____ 97. rusty menziesia (Menziesia ferruginea) gg. Shrubs less than 4 ft. ) high; leaves thick, evergreen; twigs and leaves without glandular ("sticky") hairs. h. Upright shrubs, loosely branching, not forming mats; leaves not crowded, not needlelike, more than 1/2 in. ) long. i. Leaves oblong to linear, edges rolled under. j. Corolla purple, saucer-shaped; leaves whitish beneath with inconspicuous veins ________ ______ 99.

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


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