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Pseudotsuga menziesii var. glauca, or Rocky Mountain Douglas-fir, 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. [2]
Giant sequoia. Silvics of North America (1991), [1] a forest inventory compiled and published by the United States Forest Service, includes many conifers. [a] It superseded Silvics of Forest Trees of the United States (1965), which was the first extensive American tree inventory. [3]
Tsuga mertensiana is a large evergreen conifer growing up to 20 to 40 meters (66 to 131 feet) tall, with exceptional specimens as tall as 59 m (194 ft) tall. They have a trunk diameter of up to 2 m (6 + 1 ⁄ 2 ft). The bark is about 3 centimeters (1 + 1 ⁄ 4 inches) thick and square-cracked or furrowed, and purplish-brown [3] to gray in color ...
The Douglas fir (Pseudotsuga menziesii) [4] is an evergreen conifer species in the pine family, Pinaceae.It is native to western North America and is also known as Douglas-fir, [5] Douglas spruce, [6] Oregon pine, [7] and Columbian pine. [8]
Encyclopedia of Conifers. A Comprehensive Guide to Conifer Cultivars and Species is an encyclopedia written by Aris G. Auders and Derek P. Spicer, published in 2012. The two-volume, illustrated encyclopedia is a complete reference book covering all recognised conifer cultivars and species, both hardy and tropical.
He was the first to draw attention to the bad state of the conifers at Kew in the early 1920s. [2] This finally led to the establishment of a new collection in a part of Bedgebury Forest, supervised by Dallimore. On his retirement from Kew in 1936, he moved to Kent, and continued to supervise the work at Bedgebury Pinetum, almost to the time of ...
Podocarpus (/ ˌ p oʊ d ə ˈ k ɑːr p ə s / [2]) is a genus of conifers, the most numerous and widely distributed of the podocarp family, the Podocarpaceae. Podocarpus species are evergreen shrubs or trees, usually from 1 to 25 m (3 to 82 ft) tall, known to reach 40 m (130 ft) at times.
The American Conifer Society has established a select group of public gardens, designated as "reference gardens". To be considered for this program, a garden must follow the following standards: Contain conifer collections that will educate the public about growing conifers and demonstrate their uses in the landscape