Pseudotsuga taxifolia

In 1918 Miss Helene M. Boas, of the New York Botanical Garden, sent to the writer a sample of manna which had been collected by James A. Teit near Spence s Bridge, British Columbia, from Douglas fir trees (Pseudotsuga taxifolia Brit., syn. P. Douglasii Carr.). The dry, white, crystalline manna (42.5 g.), in which some small stems and needles of the tree (4 g.) were encrusted, was entirely soluble in water and it proved to consist principally of melezitose.17 The authors stated that if the manna can be obtained in large quantities, which appears to be the case, it will indeed furnish an excellent source for melezitose. However, there was found within a few months by the same workers an abundant... 

Since the classic work of Slama and Williams (27), who first demonstrated the presence of juvabione (4) in Abies balsamea, their work has been expanded to show that this keto-sesquiterpene methyl ester and its relatives are present in the heartwoods of other Abies species and in Pseudotsuga taxifolia. They may be recovered by a simple solvent extraction of groundwood pulp. They are used in forest-insect traps. 

Source Pseudotsuga taxifolia (Lam.) Britt, (syn. P. douglasii Carr. P. mucronata (Raf.) Sudw.) (Family Pinaceae). 

Allen, G.S. 1942. Douglas-Fir Pseudotsuga taxifolia (Lamb.) Britt.) A Summary of its Life History. British Columbia Forest Service, Research Notes 9. 27 pp. 

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