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Image of Mexican Douglas-fir
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Douglas Fir

Pseudotsuga menziesii (Mirb.) Franco

Physical Description

provided by USDA PLANTS text
Tree, Evergreen, Monoecious, Habit erect, Trees without or rarely having knees, Tree with bark rough or scaly, Young shoots 3-dimensional, Buds not resinous, Leaves needle-like, Leaves alternate, Needle-like leaf margins entire (use magnification), Leaf apex acute, Leaf apex obtuse, Leaves < 5 cm long, Leaves < 10 cm long, Leaves yellow-green above, Leaves yellow-green below, Leaves blue-green, Leaves not blue-green, Scale leaf glands not ruptured, Needle-like leaves flat, Needle-like leaves not twisted, Needle-like leaf habit erect, Needle-like leaf habit drooping, Needle-like leaves per fascicle mostly 1, Needle-like leaf sheath early deciduous, Needle-like leaf sheath persistent, Twigs pubescent, Twigs not viscid, Twigs with peg-like projections or large fascicles after needles fall, Berry-like cones orange, Woody seed cones > 5 cm long, Bracts of seed cone exerted, Bracts of seed cone included, Seeds tan, Seeds brown, Seeds winged, Seeds unequally winged, Seed wings prominent, Seed wings equal to or broader than body.
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cc-by-nc-sa-3.0
compiler
Stephen C. Meyers
compiler
Aaron Liston
compiler
Steffi Ickert-Bond
compiler
Damon Little
original
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USDA PLANTS text