200 PROCEEDINGS OF THE AMERICAN ACADEMY 



1. U. harhata, Fr. Thallus terete, irregularly branched, at length 

 annulate-cracked, glaucous ; apothecia almost immarginate, radiate 

 disk pale. Fr. Liclienogr. p. 18. — a. Jlorida, Fr., very much branched 

 somewhat scabrous, apoth. large. U. Jlorida, Ach. — /5. strigosa,Ach. 

 rather small, very thickly fibrillose-strigose. Ach. Sj/n. p. 305. — y 

 rubiginea, Michx., lax, scabrous, more or less rusty-red. U. Jlorida 

 var. rubiginea, Michx. Fl. 2, p. 332. — d. hirta, very much branched 

 dwarfish, the fibrillae somewhat elongated, oftener verrucose-pulveru 

 lent. U. hirta, Iloffm. — t. plicata, Fr., pendulous, elongated, subdi 

 chotomous, entangled, lax, smoothish, pale. U. plicata, Ach. — ^. da 

 sypo'ga, Fr., pendulous, elongated, branches somewhat simple, lateral 

 fibres spreading. U. barbata, Hoffm. Lichen barbatus, L. 



Very common ; a, /?, ?, and J mostly on trees, the last two less fre- 

 quently fertile ; 5 on rails, sterile ; New England. New York, Tor- 

 rey. Pennsylvania, Muhl. Northward to Arctic America, Richardson 

 (Franklin's Narrative, App.). 



2. U. longissima, Ach. Th. pendulous, filamentous, terete-com- 

 pressed, somewhat rugulose, smoothish, nearly simple, pale glaucous, 

 vi'ith approximate, horizontal, at length tortuous fibres. Ach^ Syn. p. 

 307. 



Firs and other trees on the sides, and in swamps at the base, of the 

 high mountains of New England, and northward, occurring 5 feet long. 

 Infertile, as is also the case with the European Lichen on which the 

 species was founded. It seems, like the last species, to be very vi^idely 

 diffused ; and I have, or have seen, specimens probably belonging to it, 

 from Europe, Asia, Africa, and New Holland. A single Cape of Good 

 Hope specimen, in my possession, is fertile, and has quite concave ra- 

 diate apothecia, with somewhat elevated, obtuse margins. The earliest 

 specimen I have seen is an infertile one in the Berlin herbarium, col- 

 lected in Cappadocia by Tournefort. 



3. U. angulata, Ach. Th. pendulous, flexuous, angular, nearly sim- 

 ple, pale cinerascent ; angles acute, scabrous ; fibres horizontal approxi- 

 mated, simple, short, terete-attenuate. Ach. Syn. p. 307. Halsey, Lich. 

 New York, in Ann. Lye. I, p. 21. 



Trees, Pennsylvania, Mm/iZ., J[c/t. New York, Torrey. Massachu- 

 setts, occurring 4 feet long, Halsey. Spruce swamps, Chelmsford, 

 Russell ! 



4. U. trichodea, Ach. Th. pendulous (prostrate), very delicate 



