Douglas-fir (Pseudotsugamenziesii) is a clear, straight-trunked tree, with a spire-like crown, and the capacity to grow over 300 feet tall.
The seasonal growth of Douglas-fir (Pseudotsugamenziesii) begins during the spring (usually April) with the onset of vegetative bud growth.
During the post-glacial period Douglas-fir (Pseudotsugamenziesii) emerged as a dominant element in the coniferous forests of western North America (Hermann 1985).
We are interested in two species: Pseudotsugamenziesii which is generally the longest lived species in the Pseudotsuga-Tsuga forest type, and Thuja plicata which is known to live for over 1200 years.
Here we outline our research into how Pseudotsugamenziesii manages to live so long, and some aspects of crown development in Thuja plicata that contribute to its ability to live and growth through shaded regions of the canopy.
menziesii acclimate to the low-light environment of the late-successional canopy although the species is a pioneer.
The genus was first described by Carrière with the grand Douglas-fir of North America, Pseudotsugamenziesii, as the type species (it had formerly been placed in Pinus and Abies).
Some 22 species and 3 varieties have been described, but many of these were discriminated by Flous (1937) on the basis of subtle distinctions in leaf anatomy and largely have not been upheld (Farjon 1990).
menziesii is one of commonest trees in western North America, a serious weed in New Zealand, and easily found in most of the rest of the world's temperate terrestrial climate zones.
Pseudotsugamenziesii 'Pendula' - semi-pendulous branches with bluish-green needles
Pseudotsuga translates as "false Hemlock", referring to its vague similarity to the genusTsuga.
Pseudotsugamenziesii is known as a pyramidal evergreentree that has blue-green or bright green needles, prized as a huge timbertree in Western North America and alternatively used as an ornamental tree in landscapes, or as a Christmas tree.
Pseudotsugamenziesii var menziesii, by far the largest pine family tree, grows to 300 feet or taller & can live for a thousand years or longer.
A slightly smaller form, the Inland Douglas-fir, aka Rocky Mountain Douglas-fir (Pseudotsugamenziesii var glauca), has bluer needles & can grow higher on mountains than is generally the case with the coastal Douglas-fir.
When grown as a garden tree in the midwest, it tends to remain stunted at a manageable size, but is also susceptible to pests, though exceedingly hardy in its native range where it experiences wet autumns & mild winters & dry summers.
Specimens in the east can be found growing well without irrigation provided roots are allowed to grow in an area undisturbed by urban structures.
The variety Pseudotsugamenziesii grows along the coastal ranges reaching nearly 300 feet tall with an 8 foot trunk and is long lived; variety glauca grows slower and is found in interior ranges.
Douglas Fir / Pseudotsugamenziesii are available for purchase from Treefind.com by clicking here.
The wood of pine can be separated microscopically into the white, red, yellow and the foxtail/pinyon pine groups.
The word Pseudotsuga means ‘false hemlock", while menziesii is used in recognition of Archibald Menzies (1754-1842), a Scotch physician and naturalist, who discovered Douglas-fir in 1793 on Vancouver Island, British Colombia.
Distribution: The range of Douglas-fir extends from the Rocky Mountains to the Pacific coast and from Mexico to central British Columbia.
Pseudotsuga is a small genus of approximately five species distributed in eastern Asia and western North America.
Pseudotsugamenziesii, with a distribution from western Canada to central Mexico, is one of the most economically important timber species in the world.
Evolutionary relationships of Douglas-fir and its relatives (genusPseudotsuga) from DNA restriction fragment analysis.
menziesii), a species of Douglas-fir, is an evergreenconifer native to the coastal regions of western North America, from west-central British Columbia, Canada southward to central California, United States.
Further inland, Coast Douglas-fir is replaced by the related Rocky Mountain Douglas-fir (Pseudotsugamenziesii subsp.
Coast Douglas-fir is a very large tree, the second-tallest in the world (after Coast Redwood).
As hamadryad notes in what she wrote to accompany the photographs, both male (pollen-producing) and female (ovule-producing) cones are present in the photograph, the female cones being the pink structures which will eventually harden, colour brown and point downwards over time.
I think the source of confusion may be that this is a picture of Pseudotsugamenziesii var.
UBC BGCPR is a department of the Faculty of Land and Food Systems within The University of British Columbia.
See county distributions for the following states by clicking on them below or on the map.
Pseudotsugamenziesii (Mirbel) Franco occures in the following states: Arizona, California, Colorado, Idaho, Minnesota, Montana, New Mexico, Nevada, New York, Oregon, Pennsylvania, Texas, Utah, Washington, Wyoming
View 9 genera in Pinaceae, 2 species in Pseudotsuga or click below on a thumbnail map or name for species profiles.
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