We have already seen something of an example which illustrates this point in a remarkable manner,-that of salix polaris, the willow which has so obstinately preserved its specific identity amid great stress of circumstances.
"The Old Riddle and the Newest Answer"
John Gerard
At such a rate, we cannot but ask, how long would Evolution take to get back to the generalized type-form, or common ancestor, of the genus salix, and then to that of the Order Salicineae, which includes poplars as well as willows.
"The Old Riddle and the Newest Answer"
John Gerard
21. salix tetrasperma, i.
"Himalayan Journals V2."
J. D. Hooker