(Picea spp./Pinaceae). The genus Picea contains about 30 species 7 native to North America , 2 to
Mexico , and 20 to Eurasia . Microscopically, the wood of
all species in this genus looks alike in their basic anatomy,
with the exception of Sitka spruce (Picea sitchensis) from western
North America. It consistently contains crystals in its rays,
as do the 3 European species on rare occasions. The commercial
species native to North America are listed below.
|Eastern North America
here to view a chart of Key: Softwoods.
Characteristics found in the Spruces
- Resin Canals present
- Epithelia with thick walls
- Pits on ray tracheids either dentate (Picea type 2) or
angular (Picea type 1)
- extremely rare appearance of crystals in European species
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