A plant genus in the family PINACEAE, order Pinales, class Pinopsida, division Coniferophyta. They are coniferous evergreen trees with long, flat, spirally arranged needles that grow directly from the branch.

Branch junctions and the flow of water through xylem in Douglas-fir and ponderosa pine stems. (1/37)

Water flowing through the xylem from the roots to the leaves of most plants must pass through junctions where branches have developed from the main stem. These junctions have been studied as both flow constrictions and components of a hydraulic segmentation mechanism to protect the main axes of the plant. The hydraulic nature of the branch junction also affects the degree to which branches interact and can respond to changes in flow to other branches. The junctions from shoots of two conifer species were studied, with particular emphasis on the coupling between the downstream branches. Flow was observed qualitatively by forcing stain through the junctions and the resulting patterns showed that flow into a branch was confined to just part of the subtending xylem until a considerable distance below the junction. Junctions were studied quantitatively by measuring flow rates in a branch before and after flow was stopped in an adjacent branch and by measuring the hydraulic resistance of the components of the junction. Following flow stoppage in the adjacent branch, flow into the remaining branch increased, but considerably less than predicted based on a simple resistance analogue for the branch junction that assumes the two branches are fully coupled. The branches downstream from a junction, therefore, appear to be limited in their interconnectedness and hence in their ability to interact.  (+info)

Ethanol synthesis and aerobic respiration in the laboratory by leader segments of Douglas-fir seedlings from winter and spring. (2/37)

Stem segments from terminal leaders of Douglas-fir, Pseudotsuga menziesii (Mirb.) Franco, seedlings were sampled in mid-December when cambial cells were dormant. The residual, debudded leaders were resampled again in early May when the cambium was metabolically active. May stems had higher constitutive ethanol concentrations than December stems. This was not the result of cambial hypoxia generated by rapid spring respiration rates, because when aerobic respiration was stimulated by incubating the stems in air at 30 degrees C ethanol production was induced in December, but not in May. Rapid respiration rates at 30 degrees C may have depleted O(2) supplies and induced ethanol production in December stems because dormant, thick-walled cambial cells may be less permeable to CO(2) and O(2), compared with metabolically active, thin-walled cambial cells in May. December stem segments incubated in a N(2) atmosphere at 30 degrees C synthesized 1.8 times more ethanol than segments from May, most likely because spring growth had reduced the soluble sugars available for fermentation. CO(2) efflux from May stems (after 5.5 h of incubation at 30 degrees C) was equal to December stems per unit volume, but greater than December stems per unit surface area. N(2)-induced ethanol concentrations were positively related with CO(2) efflux per unit volume, indicating that rapidly respiring leaders can maintain rapid fermentation rates, provided soluble sugars are readily available. N(2)-induced ethanol and CO(2) efflux per unit volume declined with increasing leader diameter in both seasons, whereas there were no relationships between CO(2) efflux per unit surface area and diameter. Cambium physiology and phenology influence the induction of fermentation and concentrations of ethanol produced in terminal leaders of Douglas-fir, and probably other conifers as well. This needs to be considered when comparing fermentation among species, or comparing individuals from different seasons, or disparate ages within a species.  (+info)

Methyl jasmonate-induced ethylene production is responsible for conifer phloem defense responses and reprogramming of stem cambial zone for traumatic resin duct formation. (3/37)

Conifer stem pest resistance includes constitutive defenses that discourage invasion and inducible defenses, including phenolic and terpenoid resin synthesis. Recently, methyl jasmonate (MJ) was shown to induce conifer resin and phenolic defenses; however, it is not known if MJ is the direct effector or if there is a downstream signal. Exogenous applications of MJ, methyl salicylate, and ethylene were used to assess inducible defense signaling mechanisms in conifer stems. MJ and ethylene but not methyl salicylate caused enhanced phenolic synthesis in polyphenolic parenchyma cells, early sclereid lignification, and reprogramming of the cambial zone to form traumatic resin ducts in Pseudotsuga menziesii and Sequoiadendron giganteum. Similar responses in internodes above and below treated internodes indicate transport of a signal giving a systemic response. Studies focusing on P. menziesii showed MJ induced ethylene production earlier and 77-fold higher than wounding. Ethylene production was also induced in internodes above the MJ-treated internode. Pretreatment of P. menziesii stems with the ethylene response inhibitor 1-methylcyclopropene inhibited MJ and wound responses. Wounding increased 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase protein, but MJ treatment produced a higher and more rapid ACC oxidase increase. ACC oxidase was most abundant in ray parenchyma cells, followed by cambial zone cells and resin duct epithelia. The data show these MJ-induced defense responses are mediated by ethylene. The cambial zone xylem mother cells are reprogrammed to differentiate into resin-secreting epithelial cells by an MJ-induced ethylene burst, whereas polyphenolic parenchyma cells are activated to increase polyphenol production. The results also indicate a central role of ray parenchyma in ethylene-induced defense.  (+info)

Multinucleate storage cells in Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) and the effect of seed parasitism by the chalcid Megastigmus spermotrophus Wachtl. (4/37)

Megagametophytes of Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) accumulated storage products following fertilization. As megagametophytes matured, the number of nuclei per cell rose, resulting in syncytial storage cells. Studies carried out on trees in France and Canada confirmed that such previously unreported, free nuclear cells were a normal part of late megagametophyte development. Unfertilized megagametophytes showed that some binucleate cells before degeneration resulted in empty seed. Insect parasitism prevented megagametophyte abortion in unfertilized ovules. Oviposition by a torymid chalcid wasp (Megastigmus spermotrophus Wachtl) early in megagametophyte development resulted in normal megagametophyte development. Around the time of plant egg maturation, binucleate and trinucleate cells were observed. As megagametophytes matured, multinucleate mature storage cells rich in proteins, lipids and starch were formed. The insect was able to induce identical nuclear behaviour in infested, unfertilized megagametophytes, as that of uninfested, fertilized megagametophytes.  (+info)

Seed parasitism redirects ovule development in Douglas fir. (5/37)

Many parasitic species of insects complete their entire development in seeds. They feed off storage reserves within the ovule. These reserves only normally accumulate in fertilized ovules. Consequently, female insects that oviposit their eggs directly into the plant ovule need to be able to select correctly, as unfertilized ovules of conifers normally become so-called empty seed. We provide clear evidence that in conifers, seed-parasitizing insects do not need to discriminate between fertilized and unfertilized plant ovules when ovipositing their eggs. A host-specific insect, the chalcid Megastigmus spermotrophus Wachtl (Hymenoptera: Torymidae), lays its eggs in ovules of Douglas fir (Pseudotsuga menziesii (Mirbel) Franco) before fertilization has taken place in the plant. Oviposition not only prevents the expected degeneration and death of unfertilized ovules, but it induces energy reserve accumulation. Ovules that would otherwise develop as empty seed are redirected in their development by the insect to provide food for the developing larvae. Instead of the insect exploiting normal events during seed development, the insect manipulates seed development for its own reproductive advantage.  (+info)

Storage versus substrate limitation to bole respiratory potential in two coniferous tree species of contrasting sapwood width. (6/37)

Two coniferous tree species of contrasting sapwood width (Pinus ponderosa L., ponderosa pine and Pseudotsuga menziesii Mirb., Douglas-fir) were compared to determine whether bole respiratory potential was correlated with available storage space in ray parenchyma cells and/or respiratory substrate concentration of tissues (total nitrogen content, N; and total non-structural carbohydrate content, TNC). An increment core-based, laboratory method under controlled temperature was used to measure tissue-level respiration (termed respiratory potential) from multiple positions in mature boles (>100-years-old). The most significant tissue-level differences that occurred were that N and TNC were two to six times higher for inner bark than sapwood, TNC was about two times higher in ponderosa pine than Douglas-fir and there was significant seasonal variation in TNC. Ray cell abundance was not correlated with sapwood respiratory potential, whereas N and TNC often were, implying that respiratory potential tended to be more limited by substrate than storage space. When scaled from cores to whole boles (excluding branches), potential net CO2 efflux correlated positively with live bole volume (inner bark plus sapwood), live bole ray volume, N mass, and TNC mass (adjusted R2 > or =0.4). This relationship did not differ between species for N mass, but did for live bole volume, live bole ray volume, and TNC mass. Therefore, N mass appeared to be a good predictor of bole respiratory potential. The differences in net CO2 efflux between the species were largely explained by the species' relative amounts of whole-bole storage space or substrate mass. For example, ponderosa pine's inner bark was thinner than Douglas-fir's, which had the greater concentration of ray cells and TNC compared with the sapwood. This resulted in ponderosa pine boles having 30-60% less ray volume and 10-30% less TNC mass, and caused ponderosa pine net CO2 efflux/ray volume and net CO2 efflux/TNC mass to be 20-50% higher than Douglas-fir. In addition, because inner bark respiratory potential was 2-25 times higher than that of sapwood, ponderosa pine's thinner inner bark and deeper sapwood (relative to Douglas-fir) caused its bole net CO2 efflux/live bole volume to be 20-25% lower than that of similarly-sized Douglas-fir trees.  (+info)

Nucleotide diversity and linkage disequilibrium in cold-hardiness- and wood quality-related candidate genes in Douglas fir. (7/37)

Nuclear sequence variation and linkage disequilibrium (LD) were studied in 15 cold-hardiness- and 3 wood quality-related candidate genes in Douglas fir [Pseudotsuga menziesii (Mirb.) Franco]. This set of genes was selected on the basis of its function in other plants and collocation with cold-hardiness-related quantitative trait loci (QTL). The single-nucleotide polymorphism (SNP) discovery panel represented 24 different trees from six regions in Washington and Oregon plus parents of a segregating population used in the QTL study. The frequency of SNPs was one SNP per 46 bp across coding and noncoding regions on average. Haplotype and nucleotide diversities were also moderately high with H(d) = 0.827 +/- 0.043 and pi = 0.00655 +/- 0.00082 on average, respectively. The nonsynonymous (replacement) nucleotide substitutions were almost five times less frequent than synonymous ones and substitutions in noncoding regions. LD decayed relatively slowly but steadily within genes. Haploblock analysis was used to define haplotype tag SNPs (htSNPs). These data will help to select SNPs for association mapping, which is already in progress.  (+info)

Genecology of Douglas fir in western Oregon and Washington. (8/37)

BACKGROUND AND AIMS: Genecological knowledge is important for understanding evolutionary processes and for managing genetic resources. Previous studies of coastal Douglas fir (Pseudotsuga menziesii var. menziesii) have been inconclusive with respect to geographical patterns of variation, due in part to limited sample intensity and geographical and climatic representation. This study describes and maps patterns of genetic variation in adaptive traits in coastal Douglas fir in western Oregon and Washington, USA. METHODS: Traits of growth, phenology and partitioning were measured in seedlings of 1338 parents from 1048 locations grown in common gardens. Relations between traits and environments of seed sources were explored using regressions and canonical correlation analysis. Maps of genetic variation as related to the environment were developed using a geographical information system (GIS). KEY RESULTS: Populations differed considerably for adaptive traits, in particular for bud phenology and emergence. Variation in bud-set, emergence and growth was strongly related to elevation and cool-season temperatures. Variation in bud-burst and partitioning to stem diameter versus height was related to latitude and summer drought. Seedlings from the east side of the Washington Cascades were considerably smaller, set bud later and burst bud earlier than populations from the west side. CONCLUSIONS: Winter temperatures and frost dates are of overriding importance to the adaptation of Douglas fir to Pacific Northwest environments. Summer drought is of less importance. Maps generated using canonical correlation analysis and GIS allow easy visualization of a complex array of traits as related to a complex array of environments. The composite traits derived from canonical correlation analysis show two different patterns of variation associated with different gradients of cool-season temperatures and summer drought. The difference in growth and phenology between the westside and eastside Washington Cascades is hypothesized to be a consequence of the presence of interior variety (P. menziessii var. glauca) on the eastside.  (+info)

"Pseudotsuga" is not a medical term. It is a genus of coniferous trees in the family Pinaceae, commonly known as Douglas firs or Douglas trees. They are native to western North America and eastern Asia. The most widely known species is Pseudotsuga menziesii, which is often simply called the Douglas fir. These trees have important economic value for timber and pulp production.

Japanese Douglas-fir Pseudotsuga sinensis Dode Chinese Douglas-fir Pseudotsuga sinensis var. sinensis Pseudotsuga sinensis var ... Pseudotsuga macrocarpa (Vasey) Mayr bigcone Douglas-fir - southern California Pseudotsuga menziesii (Mirb.) Franco - western ... menziesii coast Douglas-fir Pseudotsuga menziesii var. glauca (Beissn.) Franco Rocky Mountain Douglas-fir Pseudotsuga menziesii ... Wikimedia Commons has media related to: Pseudotsuga (category) Gymnosperm Database - Pseudotsuga Arboretum de Villardebelle: ...
... var. wilsoniana, Taiwan Douglas-fir, is sometimes treated as its own species, Pseudotsuga wilsoniana. This ... Pseudotsuga sinensis (Chinese Douglas-fir; in Chinese 黃杉, pinyin romanization: huáng shān) is a species of conifer in the ... "Pseudotsuga sinensis at Gymnosperm Database". The Gymnosperm Database. Luu, Nguyen Duc To; Thomas Ian, Philip (2004). Cay La ... "Pseudotsuga sinensis". Flora of China. Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. ...
Media related to Pseudotsuga japonica at Wikimedia Commons Data related to Pseudotsuga japonica at Wikispecies v t e (Articles ... Pseudotsuga japonica, the Japanese Douglas-fir, is a species of conifer in the pine family, Pinaceae, that is endemic to Japan ... "Pseudotsuga japonica". Germplasm Resources Information Network. Agricultural Research Service, United States Department of ... Japanese calls this tree 'Togasawara (トガサワラ)'.[citation needed] Katsuki, T.; Luscombe, D.; Farjon, A. (2013). "Pseudotsuga ...
Some hybrids of Pseudotsuga macrocarpa (Bigcone Douglas-fir) × Pseudotsuga menziesii (Coast Douglas-fir) show promise for ... Media related to Pseudotsuga macrocarpa at Wikimedia Commons Calflora Conifers.org, Gymnosperm Database: Pseudotsuga macrocarpa ... Pseudotsuga macrocarpa typically grows from 15-30 m (49-98 ft) in height and 56-155 cm (1 ft 10 in - 5 ft 1 in) in trunk ... Pseudotsuga macrocarpa is a Douglas-fir. The name "bigcone spruce", though confusing as it is not a spruce species, is often ...
... is a moth of the family Yponomeutidae. It is found in North America, including Washington. Adults ... The larvae feed on Pseudotsuga menziesii. They mine the twigs and tips of their host plant. The larvae enter the twigs at a ...
... , commonly known as the Mexican Douglas-fir, is a conifer in the genus Pseudotsuga that is ... Data related to Pseudotsuga menziesii var. lindleyana at Wikispecies The Gymnosperm Database: Pseudotsuga lindleyana - Old ... Pseudotsuga lindleyana in Pseudotsuga menziesii var. glauca - New Classification v t e (Articles with short description, Short ... Pseudotsuga menziesii var. lindleyana is native to the Sierra Madre Occidental, Sierra Madre Oriental, and scattered mountains ...
C. Michael Hogan (2008). Douglas-fir: "Pseudotsuga menzesii", GlobalTwitcher.com, ed. N. Stromberg "Douglas-fir (Pseudotsuga ... Pseudotsuga menziesii var. lindleyana). Rocky Mountain Douglas-fir is most commonly treated as a variety (Pseudotsuga menziesii ... Pseudotsuga menziesii var. glauca, or Rocky Mountain Douglas-fir, is an evergreen conifer native to the interior mountainous ... USDA Plant Profile: Pseudotsuga menziesii var. glauca (Rocky Mountain Douglas-fir) Arboretum de Villardebelle - cone photos ...
"Pseudotsuga menziesii var. menziesii". www.fs.fed.us. Retrieved 2017-10-26. Agee, James K (1993). Fire Ecology Ecology of the ... Pseudotsuga menziesii var. menziesii, commonly known as Coast Douglas-fir, Pacific Douglas-fir, Oregon pine, or Douglas spruce ... "Pseudotsuga menziesii var. menziesii". Gymnosperm Database. Archived from the original on 2010-10-01. Retrieved March 17, 2013 ... Franklin, Jerry F.; DeBell, Dean S. (1988-05-01). "Thirty-six years of tree population change in an old-growth Pseudotsuga- ...
Pseudotsuga spp., Pseudotsuga menziesii, and Cupressus lindleyi can also be found. The arid and semi arid area can be found in ...
"Pseudotsuga menziesii ". Calflora. Berkeley, California: The Calflora Database. Lipscomb, Barney (1993). "Pseudotsuga menziesii ... Wikimedia Commons has media related to: Pseudotsuga menziesii (category) Conifers.org: Pseudotsuga menziesii Arboretum de ... The Douglas fir (Pseudotsuga menziesii) is an evergreen conifer species in the pine family, Pinaceae. It is native to western ... For this reason, the name is often written as Douglas-fir (a name also used for the genus Pseudotsuga as a whole). The specific ...
and Pseudotsuga sp.) but they did not give the best results. The chrysalis is about 35 millimetres (1.4 in) long, and the imago ...
Pseudotsuga menziesii var. glauca distribution map Archived September 21, 2011, at the Wayback Machine at Flora of North ... The Rocky Mountain Douglas-fir (Pseudotsuga menziesii var. glauca) comes near the eastern limit of its range at Calgary. ...
"Pseudotsuga menziesii var. menziesii". Gymnosperm Database. Richard, Terry (March 27, 2010). "Doerner Fir rises 327 feet into ... Other researchers have developed models of maximum height for Coast Douglas-fir (Pseudotsuga menziesii var. menziesii) trees ...
"Pseudotsuga menziesii var. menziesii". Gymnosperm Database. "The world's tallest known tropical tree has been found-and climbed ... Earle, Christopher J. "Pseudotsuga menziesii subsp. menziesii". Gymnosperm Database. Retrieved December 29, 2017. Matthews, ...
Douglas-fir (Pseudotsuga) is a host plant common to many species of the family, particularly of the genus Chionodes, which as a ... Data related to Gelechiidae at Wikispecies C. Michael Hogan (September 17, 2008). "Douglas-fir: Pseudotsuga menziesii". ...
Sadik Tuzun and Elizabeth Bent, 2006 Hogan, C. Michael (2008). "Douglas-fir: Pseudotsuga menziesii". globalTwitcher.com, ed. ...
Schar, Douglas (2015). "Douglas Fir, Pseudotsuga menziesii". Archives. Doctor Schar. Retrieved 2015-10-04. Kershaw, Linda (2000 ...
Pseudotsuga menziesii); copper beech (Fagus sylvatica 'Purpurea' ); lemon verbena (Backhousia citriodora); lemonwood/tarata ( ...
rotundus Pseudotsuga sinensis var. gaussenii Taxus cuspidata var. nana, Dwarf yew Torreya grandis var. jiulongshanensis Tsuga ...
"Gymnosperm Database: Pseudotsuga menziesii". Retrieved 2012-02-05. "Gymnosperm Database: Picea sitchensis". Retrieved 2012-02- ...
latifolia, Pseudotsuga menziesii var. glauca, Abies lasiocarpa, Tsuga heterophylla and Betula papyrifera. The larvae are twig ...
Simard, Suzanne; Bingham, Marcus A. (2012-03-01). "Ectomycorrhizal Networks of Pseudotsuga menziesii var. glauca Trees ...
Coast Douglas-fir (Pseudotsuga menziesii var. menziesii), western red cedar (Thuja plicata), bigleaf maple (Acer macrophyllum ...
The larvae feed on Pseudotsuga sinensis. tortricidae.com Catalogue of Eucosmini from China (Lepidoptera: Tortricidae) ...
Coast Douglas-fir (Pseudotsuga menziesii ssp. menziesii) is the predominant tree, occupying up to 70% of the forest cover. ... Pseudotsuga macrocarpa). Mixed coniferous forest Plant communities of California Temperate broadleaf and mixed forests in the ...
Pseudotsuga kinkelinii, needle leaves and cones. †Pseudotsuga sclereidea, two needle fragments, most like Pseudotsuga menziesii ... On the fossil history of Pseudotsuga Carr. (Pinaceae) in Europe by Lutz Kunzmann - Palaeobiodiversity and Palaeoenvironments 94 ...
Coast Douglas-firs (Pseudotsuga menziesii var. menziesii) are nearly always associated with redwoods, but in the north the ... Forest of Coast Douglas-firs Pseudotsuga menziesii subsp. menziesii Mixed evergreen forests are found just inland of the ... Characteristic trees include coast Douglas-fir (Pseudotsuga menziesii var. menziesii), canyon live oak (Quercus chrysolepis), ... Pseudotsuga menziesii var. menziesii), California sycamore (Platanus racemosa), coast live oak (Quercus agrifolia), and bigleaf ...
Coast Douglas-fir (Pseudotsuga menziesii subsp. menziesii) occurs in both mixed evergreen and montane forests. Lawson's cypress ...
The larvae feed on Pseudotsuga menziesii. Beccaloni, George; et al., eds. (February 2005). "Scientific name search". The Global ...
December 23, 2018), Pseudotsuga menziesii subsp. menziesii, Configers.org The Gymnosperm Database v t e v t e (Use mdy dates ... "Pseudotsuga menziesii (Mirbel) Franco" (PDF). Tree Factsheet. Wageningen University forest ecology and forest management group ...
Japanese Douglas-fir Pseudotsuga sinensis Dode Chinese Douglas-fir Pseudotsuga sinensis var. sinensis Pseudotsuga sinensis var ... Pseudotsuga macrocarpa (Vasey) Mayr bigcone Douglas-fir - southern California Pseudotsuga menziesii (Mirb.) Franco - western ... menziesii coast Douglas-fir Pseudotsuga menziesii var. glauca (Beissn.) Franco Rocky Mountain Douglas-fir Pseudotsuga menziesii ... Wikimedia Commons has media related to: Pseudotsuga (category) Gymnosperm Database - Pseudotsuga Arboretum de Villardebelle: ...
Species: Coastal redwood, Pseudotsuga menziesii, Sequoia sempervirens. Location: Muir Woods National Monument, California. ... pseudotsuga menziesii, redwood, redwood tree, scene, scenic, sequoia sempervirens, size, tall, terrestrial plant, tree, usa ...
Pseudotsuga menziesiiDouglas Fir
CliniTox: Management von Vergiftungen durch Giftpflanzen
Pseudotsuga menziesii photograph. Photograph #22456 by Phillip Colla / Oceanlight.com. ... Species: Douglas fir, Pseudotsuga menziesii. Location: Cathedral Grove, MacMillan Provincial Park, Vancouver Island, British ...
Etude des relations entre la section du bois daubier et la masse foliaire chez le Douglas (Pseudotsuga menziesii Mirb. Franco) ...
Pseudotsuga. Species:. menziesii. Family:. Pinaceae. Uses (Ethnobotany):. Used for lumber and in the production of veneer for ... Pseudotsuga menziesii has some common insect problems:. Giant Conifer Aphids Wood Boring Beetles in Trees Deodar Weevil / ... The genus name, Pseudotsuga, is derived from two Greek words, pseudo, meaning false or untrue, and tsuga, meaning hemlock which ...
Douglas-fir (Pseudotsuga menziesii), also called red-fir, Oregon-pine, Douglas-spruce, and piño Oregon (Spanish), is one of the ... Barcode data: Pseudotsuga menziesii. The following is a representative barcode sequence, the centroid of all available ... The genus Pseudotsuga includes two species (P. menziesii and P. macrocarpa) indigenous to North America and five species native ... Pseudotsuga mucronata (Raf.) Sudw.: Mexico (Mesoamerica). Canada (North America). Note: This information is based on ...
Pseudotsuga sinensis subsp. forrestii (Craib) Silba. First published in J. Int. Conifer Preserv. Soc. 15: 63 (2008) ...
Pokrovskaya,I.M. Upper Cretaceous spore-pollen complexes of the Western Siberian Lowlands. (In: Atlas of Upper Cretaceous, Paleocene and Eocene spore-pollen complexes of various Regions of the USSR ...
Pseudotsuga,/element, ,authors,,author data-id=7348 title=Carrière, E.A.,Carrière,/author,,/authors,,/name,,/ ... Pseudotsuga(gen.). Pseudotsuga. Carrière. , legitimate. , scientific. Carrière, E.A.. (1867). , Traite General des Coniferes. ...
Trees conic, evergreen. Bark initially smooth, with resin blisters; in age reddish brown, corky, furrowed. Branches often pendulous, irregularly whorled; short (spur) shoots absent; leaf scars transversely elliptic, slightly raised proximally but essentially flush with twig distally. Buds elongate, not resinous, apex acute. Leaves borne singly, persisting 6--8 years, alternate, short-stalked, flattened; resin canals 2, marginal. Cones borne on year-old twigs. Pollen cones axillary. Seed cones maturing first season, shed whole, deflexed or pendent, ellipsoid, ovoid, or cylindric, nearly sessile, lacking apophysis and umbo; scales persistent, apex rounded; bracts ± exserted, apex 3-lobed, lobes with acute apices, central lobe narrow, longer than lateral lobes. Seeds winged; cotyledons 6--12. x =12, 13 ...
Check for Pseudotsuga menziesii at. World Flora Online, GBIF or IPNI *[78] Pseudotsuga menziesii - Institute of Food and ... Synonyms: Abies menziesii Mirb., Pseudotsuga mucronata (Raf.) Sudw.. menziesii => after Archibald Menzies, a famous Scottish ...
Be the first to review "PSEUDOTSUGA menziesii Zehusice" Cancel reply. You must be logged in to post a review. ...
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... is an evergreen conifer that was named after David Douglas who sent the first seed back ... Pseudotsuga menziesii - Douglas Fir is an evergreen conifer that was named after David Douglas who sent the first seed back ... If protection is required for Pseudotsuga menziesii - Douglas Fir then you may wish to consider Tubex Treeguard which is an ... Pseudotsuga menziesii - Douglas Fir is an evergreen conifer that was named after David Douglas who sent the first seed back ...
Pseudotsuga menziesii (Mirb.) Franco No validated Piñeiro de Oregón,Abeto Douglas. See species ...
... is a highly valued timber tree, and it is also becoming a popular alternative to the traditional ... Growing in the New Pinetum, Pseudotsuga menziesii, or the Douglas fir, is an impressive tree. ...
no people present in picture Blair and Gowan
Pseudotsuga menziesii - Pinaceae. Plus buy, high quality, wood products made from Douglas Fir ...
Pseudotsuga menziesii Caribou Douglas Fir This product is currently out of stock and unavailable. ...
Foliar moisture content influences crown fire ignition and behaviour. Some spatial variation in foliar moisture is attributable to differences in stand conditions but evidence describing this role is lacking or contradicting. Aims. To examine the role of stand conditions on tree physiology and foliar moisture content in Oregon white oak (Quercus garryana) and Douglas-fir (Pseudotsuga menziesii ...
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Pseudotsuga menziesii (aka Douglas Fir). Tree, conifer for bright shade - sun in zone 4a - 9b. Grows 15 FT - 20 FT - wide, 50 ... Pseudotsuga ALL KNOWN NAMES: Pseudotsuga menziesii Dougl ...
Buy Pseudotsuga menziesii saplings for quick UK delivery. The Douglas Fir (Pseudotsuga menziesii) is a tall conical tree. ... Pseudotsuga menziesii trees online. Douglas Fir trees for sale. Pseudotsuga menziesii seedlings available for planting now. ... Douglas Fir - Pseudotsuga menziesii £11.95 Order Douglas Fir Trees - Pseudotsuga menziesii trees online. Douglas Fir trees for ... Buy Pseudotsuga menziesii saplings for quick UK delivery. The Douglas Fir (Pseudotsuga menziesii) is a tall conical tree. ...
A garden picture New growth starting in early May, a good miniature cultivar from the US, grows about 2.5cms/1inch per year.
Pseudotsuga. Species:. menziesii. Family:. Pinaceae. Uses (Ethnobotany):. Used for lumber and in the production of veneer for ... Pseudotsuga menziesii has some common insect problems:. Giant Conifer Aphids Wood Boring Beetles in Trees Deodar Weevil / ... The genus name, Pseudotsuga, is derived from two Greek words, pseudo, meaning false or untrue, and tsuga, meaning hemlock which ...
Douglas Fir Essential Oil - Pseudotsuga douglasii 100% Pure. £15.50. BOTANICAL NAME: Pseudotsuga douglasii (Abies Grandis ... Douglas Fir (Pseudotsuga douglasii) is a fir native to the Pacific Northwest of North America, occurring at altitudes of sea ... Home , Shop , Oils , Essential Oils , Douglas Fir Essential Oil - Pseudotsuga douglasii 100% Pure. ...
  • Pseudotsuga menziesii (Douglas fir proper) is widespread in western North America and is an important source of timber. (wikipedia.org)
  • The tree takes its English name from David Douglas, the Scottish botanist who first introduced Pseudotsuga menziesii into cultivation at Scone Palace in 1827. (wikipedia.org)
  • Pseudotsuga menziesii var. (wikipedia.org)
  • Pseudotsuga macrocarpa (Vasey) Mayr bigcone Douglas-fir - southern California Pseudotsuga menziesii (Mirb. (wikipedia.org)
  • Franco - western North America from Alaska to Oaxaca Pseudotsuga menziesii var. (wikipedia.org)
  • menziesii coast Douglas-fir Pseudotsuga menziesii var. (wikipedia.org)
  • Franco Rocky Mountain Douglas-fir Pseudotsuga menziesii var. (wikipedia.org)
  • Look no further than the Pseudotsuga menziesii var. (sheffields.com)
  • The Rocky Mountain variety of the Douglas Fir is the Pseudotsuga menziesii var. (sheffields.com)
  • Overall, the Pseudotsuga menziesii var. (sheffields.com)
  • Evaluation of some markers of vigor in seedlings of Douglas fir (Pseudotsuga menziesii (Mirb. (afs-journal.org)
  • Pseudotsuga menziesii - Douglas Fir is an evergreen conifer that was named after David Douglas who sent the first seed back from North America to Britain in 1827. (cheviot-trees.co.uk)
  • If protection is required for Pseudotsuga menziesii - Douglas Fir then you may wish to consider Tubex Treeguard which is an open mesh guard. (cheviot-trees.co.uk)
  • Disentangling the effects of age and global change on Pseudotsuga menziesii (Mirb. (unibo.it)
  • Dynamic mechanical analysis (DMA) and small angle X-ray scattering (SAXS) measurements of water-saturated wood of Douglas fir ( Pseudotsuga menziesii ) in the temperature range of 0 ℃ to 100 ℃ were focused to clarify microstructural changes within an annual ring. (springeropen.com)
  • Associated species: Pseudotsuga menziesii,Quercus garryana. (berkeley.edu)
  • Douglas-fir ( Pseudotsuga menziesii ) is the dominant conifer both as a seral and climax species. (mt.gov)
  • Researchers sourced wood cores from coast Douglas fir ( Pseudotsuga menziesii (Mirb. (chemistryworld.com)
  • Additionally, it can also be found growing alongside or near Douglas Fir (Pseudotsuga menziesii), Junipers (Juniperus spp. (conps.org)
  • However, today the islands boast extensive second-growth forests of Douglas fir (Pseudotsuga menziesii var. (cornforthimages.com)
  • Red indicates the 3 C. gattii isolates from the Netherlands cultured from Douglas fir ( Pseudotsuga menziesii ) (CBS12349, CBS12355, CBS12356) and 1 clinical isolate from 1957 from the Netherlands (CBS2502) ( 6 ). (nih.gov)
  • Because of their distinctive cones, Douglas firs were finally placed in the new genus Pseudotsuga (meaning "false hemlock") by the French botanist Carrière in 1867. (wikipedia.org)
  • The hyphenated form "Douglas-fir" is used by some to indicate that Pseudotsuga species are not true firs, which belong to the genus Abies. (wikipedia.org)
  • The Douglas Fir is often mistakenly referred to as a true fir, but it actually belongs to the genus Pseudotsuga. (sheffields.com)
  • Pseudotsuga /ˌsjuːdoʊˈtsuːɡə/ is a genus of evergreen coniferous trees in the family Pinaceae (subfamily Laricoideae). (wikipedia.org)
  • Pseudotsuga sinensis is a species of conifer in the Pinaceae family. (hobbyseeds.com)
  • Pseudotsuga douglasii macrocarpa (Vasey) Engelm. (theferns.info)
  • Pseudotsuga macrocarpa grows in southern California, where the climate is warm temperate, with cool, moist winters and warm, dry summers. (theferns.info)
  • Pseudotsuga macrocarpa is perfectly suitable for amenity planting and as a specimen tree in gardens and parks in milder climates, but rarely seen outside specialist collections in arboreta and botanic gardens. (theferns.info)

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