Coloradoâs major tree species include bristlecone pine, Colorado blue spruce, Douglas-fir, Engelmann spruce, limber pine, lodgepole pine, narrowleaf cottonwood, quaking aspen, piÃ±on pine, plains cottonwood, ponderosa pine, Rocky Mountain juniper, subalpine fir and white fir.
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Power Thesaurus. 1969. spontaneous generation thesaurus http://www.powerthesaurus.org/spontaneous_generation/synonyms (accessed August 27, 2017).