ALECTORIA. 43 



Europe, for U. barbata, v. dasypoga; as the smaller has been 

 saluted as U. filaris, Ach., and U. Jamaicensis, Ach. 



5. U. longissima, Ach. ; thallus pendulous, greatly elongated, 

 terete, or compressed-terete, scurfy; glaucescent; sub-simple or 

 sparingly divided, clothed thickly with horizontal, rather straight, 

 more or less scabrous fibrils ; [apothecia, in Bavarian specimens, 

 of middling size, disk pale-flesh-coloured. Spores ellipsoid, 

 ^ mic.] Ach.L.U.p.626. Tuck.Exs.l. Nyl8yn.l,p.WQ. 



Trees on high mountains ; New England, Tuckerman Enum. 

 1845. Newfoundland, Herb. Hook. North shore of Lake Supe- 

 rior, Agassiz. Washington Territory, Herb. Torr. Kussian 

 America, Dr. Kellogg. 



6. U. cavernosa, Tuckerm.; thallus pendulous, elongated, 

 compressed -terete or angulate, lacunose, glaucesceut; below 

 remotely branched, attenuated above into long, dichotomously 

 much-divided, densely intertangled, finally capillary extremities, 

 scarcely fibrillose ; apothecia small to middling sized ; disk pale- 

 flesh-coloured, with a white bloom. Spores rounded-ellipsoid, 



mic. Tuckerm. in Agass. L. Super. Append. 1850. U- 



lacunosa (Willcl. msc.) Nyl. Syn. \,p. 271. 



Trees; Shores of Lake Superior (Castelnau in. Mus. Par.}, 

 Tuckerman 1. c. 1850. Kocky Mountains, Hayden. British 



Columbia, Dr. Lyall. White Mountains. Well distinguished 



in habit from our other species ; and resembling Alectoria ochro- 

 leuca, v. sarmentosa. 



VI. ALECTOKIA (Ach.) Nyl. 



Apothecia scutellseform, lateral, innate-sessile; the disk 

 coloured differently from the thallus. Spores ellipsoid, for 

 the most part simple or, in one instance, muriform-multiloc- 

 ular, brown, or more often decolorate. Sperrnatia staff- 

 shaped, a little thickened towards each end ; upon sparingly 

 branched sterigmas. Thallus fruticulosa, or pendulous; 

 terete or compressed-terete; alike on all sides; .brown or 

 straw-coloured ; the cottony medullary layer loose, and the 



thallus now hollow. Anatomy of the thallus in Schweud. 



Undersuch. I. c. 2, p. 144, t. 3,f. 1-29. 



1. A. divergens (Ach.) Nyl.; thallus tufted, erect, or pros- 



