tree-lichens

This is often saddled upon the limb in the same manner, though it is generally more or less pendent; it is deep and soft, composed mostly of some vegetable down, covered all over with delicate tree-lichens, and, except that it is much larger, appears almost identical with the nest of the humming-bird.

A Book of Natural History Young Folks' Library Volume XIV. Various 1891

This is often saddled upon the limb in the same manner, though it is generally more or less pendent; it is deep and soft, composed mostly of some vegetable down covered all over with delicate tree-lichens, and, except that it is much larger, appears almost identical with the nest of the hummingbird.

In the Catskills Selections from the Writings of John Burroughs John Burroughs 1879

Nearly everywhere the fallen stems are covered, often concealed, by an exceedingly luxuriant bed of mosses, while on the other hand tree-lichens, probably in consequence of the dry inland climate of Siberia, occur sparingly.

The Voyage of the Vega round Asia and Europe, Volume I and Volume II Alexander Leslie 1866