42 TJSNEA. 



and its subordinate conditions, and b, being low-country forms,, 

 extending through the whole north and south, including Mexico; 

 and c, and d, especially northern, or at least mountain ones ; e 

 is ill-exhibited in North America ; but is not wholly wanting on 

 the Pacific Coast ; Scouler; Macoun. 



3. U. angulata, Ach. ; thallus pendulous, greatly elongated, 

 rather rigid, angulate, sparingly divided, thickly clothed with 

 horizontal, terete, attenuate fibrils ; glaucescent ; apothecia, of 

 ours smallish, but of Brazilian specimens ample ; pale-flesh- 

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



mic. Ach. Syn. p. 307. Hals. Syn. View. p. 21. Tuck. Exs. 



51. Nyl. Syn. I, p. 272. 



Trees, northern States (Muhlenberg) Ach. Syn. 1814 ; south- 

 ern States, Mavenel ; Wright; and found in the greatest luxuri- 

 ance in Mexico, the West Indies, and South America. Thallus 

 sharply- often four-angled ; but occurring also in part papillate- 

 scabrous, and the angles less distinct, when the lichen come& 

 very close to U. barbata. 



4. U. trichodea, Ach. ; thallus pendulous, elongated, slender,, 

 or very slender, and lax, terete, smooth ; glaucescent, the mostly 

 few, main branches giving out many shorter, spreading ones, 

 and with the scattered and irregular flexuous fibrils becoming 

 more or less contorted; apothecia (frequent) small, or very 

 small ; disk pale-flesh-coloured ; margin sparingly, or scarcely 

 radiate. Spores much as in U. barbata, or a little smaller, 3 

 mic.; and the most slender southern forms agreeing in this with 

 the northern. A rather coarser, very abundant southern form 



offers larger spores, -^y- mic. Ach. Meth. p. 312. Tuckerm. 



' Syn. N. Eng.p.S. 



Trees, Nova Scotia (Menzies) Ach. Meth. 1803. White 

 Mountains, Tuckerman. New Jersey, Austin. Throughout 

 the Southern States, Schweinitz ; Hale; Wright. The very 

 slender northern lichen of Menzies ! which Acharius originally 

 described, is also an inhabitant of the Southern States (Texas, 

 Wright), but passes into a coarser one with the flexuous fibrils 

 much more numerous and marked ( U. discoidea, Fr. herb ! U. 

 trichodea, v. ciliata, Mull. Lich. Beitr. in Flora, 1875), and the 

 aspect of U. longissima ; for which last it has often been taken r 

 . both here and in Europe. This larger form has also passed, in 



