He assigned different trees to different instruments based on their role in the forest (though in the case of sitka spruce, he assigned it to the cello because it's a common wood used in cello construction) and a key so all the players were on the same page (in this case, a rather foreboding D minor). (scientificamerican.com)
In case you didn't follow the link, it's to a series of articles abstracted in PubMed on the phylogenetic relationships between red deer, sitka deer, and wapiti (the American elk). (religion.blogs.cnn.com)
Solid sitka spruce top, solid rosewood back and sides. (shoppok.com)