![]() macrocarpa as a clearly distinct taxon, and provided new detail on differentiation within Ps. ![]() 2013) has again examined terpenes, along with leaf essential oils and genetic markers. 2012, Adams and Stoehr 2013, Adams et al. The most recent work, by Adams and colleagues (Adams et al. Peng and Adams (1989) presented evidence from Mexico suggesting that (at least some) Douglas-fir in northeast Mexico is genetically distinct from the taxon in North America. Snajberk and Zavarin (1976) performed a rangewide analysis of needle terpene compositions that found consistent differences between coastal, Sierra Nevada, northern interior, and southern interior regions. Little (1952) subsequently provided a categorical rejection of Flous' interpretation. Flous (1934a, 1934b) named an excessively large number of taxa throughout the American range of the genus Pseudotsuga based on cone characters that proved poorly formulated, unreliable and subject to individual variation. There is limited evidence for other varieties or subspecies in Mexico. The subspecies are sympatric in southern British Columbia and northeastern Washington ( Lipscomb 1993). An extremely complex nomenclatural controversy surrounded this species from 1800 to 1950 for a detailed recounting of this controversy, see Reveal for an even more detailed account see Hermann (1982). ![]() These are only the most prominent of many, many names this species has borne I don't know of any other species that has been so widely recognized as unique and readily distinguishable, yet has held so many names. Syn: Abies menziesii Mirbel 1825 Pinus taxifolia Lambert 1803, not Salisbury 1796 Pseudotsuga douglasii (Lindley) Carrière Pseudotsuga taxifolia (Lambert) Britton. ĭouglas-fir Douglas, yellow or red spruce Oregon pine, Douglastree ( Peattie 1950), sapin de Douglas ( Lipscomb 1993) abeto de Douglas, piño Oregon ( Burns & Honkala 1990), Douglasia, abete de Douglas, abete americano, pino dell'Oregon, Douglasie, Douglasgran. This cross-section displayed at the Seaport Museum in Raymond, Washington shows how an old-growth log harvested in the 20th Century might typically be cut to render commercial timber. Īt some sites the species occurs near timberline and assumes a krummholz growth form this example is subsp. Immature seed cone and active pollen cones on a shoot of subsp. Young, receptive seed cone on a shoot of subsp. menziesii, showing pollen cone buds and the manner of leaf attachment to the twig. Ĭloseup of the underside of a sun foliage shoot of P. Ī "wolfy" tree near a windy seashore on San Juan Island in Washington. The Queets fir, for 50 years one of the largest known Douglas-firs. Illustration of tree, cones, seeds, and foliage. ![]()
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