STICTA. 97 



mountains to N. and S. Carolina, Eavenel; and is found also on 



the N. W. Coast, Douglas ; Hall. b is a tree-form, found in 



Pennsylvania, Krempelhuber Exot. Flecht. 1868, and, well- 

 marked, in California, Fitch, and Oregon, Hall c, a rock- 

 form first noted as an United States plant by Delise, Stict. 1822, 

 occurs, as distinguishable now from a as the European, at the 

 White Mountains, Tucker man, Syn., 1848, and northward to 

 islands of Behriug's Straits, Wright. 



9. S. Oregana, Tuckerm. ; thallus coriaceous-membrana- 

 ceous, ample, lacero-laciniate, lacunose-reticulate ; greenish- 

 glaucescent and flavescent ; beneath reticulately brown- villous 

 between naked, white spots; lobes elongated, rounded at the 

 circumference, with erose, finally crenate-lobulate and dissected 

 edges ; apothecia scattered, middling-sized ; the disk chestnut 

 the thin, denticulate margin finally excluded. Spores fusiform 



and acicular, 4-locular, without colour when free, ^~ mic. 



Bull. Torr. Bot. Club, vol. 5, 4, p. 20. 



Trees, Oregon, Hall. 



* * * Thallus as in the preceding section, except that the place 

 of gonidia is taken here by gonimia. Stict in a, Nyl. 



f Thallus bearing cyphels, tvhich are either (n. 9, 10, 11, 12) 

 urceolate or (n. 13, 14) sorediiform. 



10. 8. Humboldtii, Hook. ; thallus cartilagineous, wide-lobed, 

 villous on both sides ; ashy-grey above ; beneath pale brown, 

 more or less spongy-villous, and besprinkled with urceolate 

 whitish cyphels ; lobes irregularly and sparingly divided, with 

 rounded undulate ends; apothecia scattered, middling- sized, 

 externally villous ; disk reddish-brown ; margin entire. Spores 



fusiform, 2-4-locular, soon without colour. Del. Stict. p. 69. 



Nyl. Syn. 1, p. 341. 



Trees in Mexico, Nylander, I. c. 



11. S. tomentosa (Sw.) Ach. ; thallus smallish, membrana- 

 ceous-coriaceous, widely laciniate, mostly pitted or now smooth; 

 glaucescent passing into lurid-brown; beneath pale for the 

 most part, spongy-villous, besprinkled with concave, at length 

 ample, white cyphels; lobes deeply-divided, rounded at the 

 ends and repand-crenate, or now narrowed and bifid, sub-ciliate ; 

 apothecia scattered or sub-marginal, at length middling to 



7 



