U. cavernosa, Tuck. in Agass. L. Superior, Append. U. lacunosa, Nyl. Syn. p. 271. Trees in mountainous districts. On Pines in the Wind river mountains, with Alectoria Fremontii, Tuck. Hayden. Extending eastward to the White Mountains of New Hampshire. Alectoria jubata (L.) Ach. Syn. p. 290. Nyl. Syn. p. 280. Trees. Nebraska, Hayden. a. Fremontii, Tuckerm. Suppl. l.c. p. 422. Nyl. Syn. p. 281. Evernia, Tuck. exs. n. 52. On Pine trees, in company with Usnea cavernosa, in the Wind river mountains, fertile, Hayden. Also on the earth with Ramalina cali- fornica var., and Parmelia saxatilis, a lorediate, sterile state; The same. A characteristic lichen of the coniferous trees of North- era California and Southern Oregon. It has not yet been detected to the eastward of the Rocky Mountains. Tuck. exs. n. 53. Evernia vulpina (Wulf.) Ach. Syn. p. 245. Chlorea, Nyl. Syn. p. 274. On trees. Pines in the Laramie mountains; and on the earth, with Cetraria Islandica, at the Summit of Wind river mountains; and at Bear Butte, Black Hills, Upper Missouri, Hayden. First observed in California, by Menz- ies (Vancouver's Voyage) and according to Dr. Newberry, abundant (as it is also very luxuriantly fertile) on the branches of Labocedrus and the Western juniper in California and Oregon. This is another charac- teristical lichen of the Western coast of North America, St. Hayden's localities being the most Eastern as yet known. Occurs also, but very rarely fertile, in Europe. Tuck. exs. n. 54. E. Prunastri (L.) Ach. Syn. p. 245. Nebraska, on the earth, Hayden. Bear Park, Black Hills, on the earth, small and sterile; The same. Dactylina ramulosa (Hook.) Tuck. Obs. Lich. in Proceed. Acad. Amer. 1862. Dufourea, Hook.