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Douglas-fir (Pseudotsuga menziesii).

Douglas-fir (Pseudotsuga menziesii).
by Ariadne Unst

Douglas-fir (Pseudotsuga menziesii): Description.

Pseudotsuga menziesii has two varieties:
(a) Pseudotsuga menziesii var. menziesii, which is widespread in CA;
(b) Pseudotsuga menziesii var. glauca, which grows in the Rocky Mountains.

Douglas-fir (Pseudotsuga menziesii): FAQs (Frequently Asked Questions).

Links.

Books.

Buy Trees and Shrubs of California Trees and Shrubs of California (California Natural History Guides) by John David Stuart, et al.