Another method, which is known as Layering, consists in bending one or more of the lowest branches down against the ground, fastening it there by means of a forked stick, and then covering it with two or three inches of earth.
"Ontario Teachers' Manuals: Nature Study"
Ontario Ministry of Education
Strawberries exhibit a sort of natural Layering.
"Ontario Teachers' Manuals: Nature Study"
Ontario Ministry of Education
They then resorted to grafting and Layering, with much better success.
"The Cultivation of The Native Grape, and Manufacture of American Wines"
George Husmann