[Q]

Berkeley’s “Introduction,” p. 341, fig. 76.

[R]

“Annals and Magazine of Natural History,” April, 1849.

[S]

In “Gardener’s Chronicle” for 1873, p. 1341.

[T]

“Grevillea,” vol ii. p. 147, in note.

[U]

W. Archer, in “Quart. Journ. Micr. Sci.” vol. xiii. p. 217; vol. xiv. p. 115. Translation of Schwendener’s “Nature of the Gonidia of Lichens,” in same journal, vol. xiii. p. 235.