A Peterson Field Guide To Western Trees: Western United States and Canada - Brossura

Petrides, Olivia

 
9780395904541: A Peterson Field Guide To Western Trees: Western United States and Canada

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This newly designed field guide features detailed descriptions of 387 species, arranged in six major groups by visual similarity. The 47 color plates and 5 text drawings show distinctive details needed for identification. Color photographs and 295 color range maps accompany the species descriptions.

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Informazioni sull'autore

ROGER TORY PETERSON, one of the world’s greatest naturalists, received every major award for ornithology, natural science, and conservation as well as numerous honorary degrees, medals, and citations, including the Presidential Medal of Freedom. The Peterson Identification System has been called the greatest invention since binoculars.

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TWO-NEEDLE PINYON Pinus edulis Engelm. Pl. 1
A short, round-topped, arid-zone tree mainly of the s. Rockies.
Needles 2 per cluster, 3?4–2 in. long, dark green, sharp but
not
spiny. Cones short, 1–2 in. long, somewhat spherical, with thick,
blunt, thornless scales and 2 wingless half-inch nuts per scale.
Height 15–20 (50) ft.; diameter 1–2 (3) ft. Dry sites. Similar
species: See Lodgepole Pine. Remarks: Like the other nut pines (see
Singleleaf Pinyon), the fruits are eagerly sought by wildlife and
humans alike. Reported to be the most common tree in N.M. A single-
needle population is reported to occur in cen. Ariz. Resin from trunk
wounds is said to have been used by Native Americans to waterproof
woven bottles and to cement turquoise jewelry.

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