About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 26. Chapters: Trees of Chihuahua, Rocky Mountain Douglas-fir, Pinus ponderosa, Limber Pine, Diospyros texana, Guaiacum angustifolium, Cercis canadensis, Acacia greggii, Celtis reticulata, Esenbeckia runyonii, Quercus arizonica, Magnolia macrophylla, Prosopis glandulosa, Juniperus scopulorum, Ilex decidua, Picea engelmannii, Salix taxifolia, Calia secundiflora, Prosopis pubescens, Salix bonplandiana, Quercus gambelii, Parkinsonia aculeata, Chihuahua Pine, Rhamnus betulaefolia, Purshia mexicana, Platanus wrightii, Celtis laevigata, Chihuahua White Pine, Pinus remota, Pinus culminicola, Yucca torreyi, Picea martinezii, Eysenhardtia texana, Alnus oblongifolia, Arbutus arizonica, Quercus fusiformis, Durango Pine, Ungnadia, Abies vejarii, Sabal uresana, Pinus lumholtzii, Quercus basaseachicensis. Excerpt: The Rocky Mountain Douglas-fir, Pseudotsuga menziesii subsp. glauca, is an evergreen conifer native to the interior mountainous regions of western North America, from central British Columbia and southwest Alberta in Canada southward through the United States to the far north of Mexico. The range is continuous in the northern Rocky Mountains south to eastern Washington, eastern Oregon, Idaho, western and south-central Montana and western Wyoming, but becomes discontinuous further south, confined to "sky islands" on the higher mountains in Utah, Colorado, Arizona and New Mexico, with only very isolated small populations in eastern Nevada, westernmost Texas, and the north of Coahuila, Chihuahua, and Sonora in Mexico. It occurs from 600 m altitude in the north of the range, up to 3,000 m, rarely 3,200 m, in the south. Further west towards the Pacific coast, it is replaced by the related Coast Douglas-fir (Pseudotsuga menziesii subsp. menziesii), and to the south, it is replaced by Mexican Douglas-fir (Pseudotsuga lindleyana) in high moun...
