The chief trees of the country are the aspen (Populus tremuloides), the ash-leaved maple (Negundo aceroides), oak (Quercus alba), elm (Ulmus Americana), and many varieties of willow.
They were the true populus Romanus, alongside of whom grew up a secondary Roman people, the plebs or commons.
And, as at Rome in early times, there were at Sparta distinctions within the populus; there were 5 otot and nro,ueioves, like the majores and minores genies at Rome.
In the classics they found the food which was required to nourish the new spirit; and a variety of circumstances, among which must be reckoned the pride of a nation boasting of its descent from the Populus Romanus, rendered them apt to fling aside the obstacles that had impeded the free action of the mind through many centuries.
The principal trees, after the yellow and lodgepole pines, are the red-fir, so-called hemlock and cedar, the Engelmann spruce, the cottonwood and the aspen (Populus tremuloides).