in Thoreau’s Journal:

If you stand fronting a hillside covered with a variety of young oaks, the brightest scarlet ones — uniformly deep, dark scarlet— will be the scarlet oaks. The next most uniformly reddish a peculiar dull crimson (or salmon?), are the white oaks.

Then the large-leaved and variously tinted red oaks, scarlet, yellow, and green, and finally the yellowish and half-decayed brown leaves of the black oak.