Reproduction by shoots or cuttings.

1

1799.  “Propagation by Layering.”—Heading of an article in the Mass. Spy, Oct. 30.

2

1832.  The root which produces the young shoots for layering is called the stool.—‘Useful and Ornamental Planting’ (“Library of Useful Knowledge”), p. 27. (N.E.D.)

3