RAMALINA. 25 



L. U. p. 599 ; Syn. p. 294, fide Nyl. Eecogn. Eamal. p. 29. 

 Parmelia denticulata, Eschw. in Mart. Fl Bras. p. 221. Eama- 

 lina rigida, Mont. ! PL Cell. Cub. p. 234, in part. E. rigida De 

 Not. Framm. Lich. p. 44. E. calicaris, f. rigida, Nyl. Syn. 1, 

 p. 295, fide auct. in Prodr. N. Gran. E. complanata & E. 

 denticulata, Nyl. Eecogn. 



Trees ; Key West, Florida (Herb. Torrey.), Tuckerman Gen. 

 1872. Texas, Wright. Mexico, Nylander. Thallus, in our 

 .specimens, from half an inch to an inch and a half in length. 

 Apothecia 2-4 mm - wide, but now exceeding 10 mm -, in Mexico. The 

 present species, which is closely akin to E. calicaris, exhibits 

 now a wider form, suggesting the v. fraxinea of the latter, and 

 now a much-narrowed and branched one, comparable with the 

 v. farinacea; but also with E. rigida (Pers.). The great 

 majority of our plants fail to shew the red reaction with potash. 



11. JR. calicaris (L.) Fr. ; thallus tufted, rather rigid, soon 

 more or less reticularly-lacunose, variously divided ; apothecia 

 flattish, middling-sized to ample. Spores ellipsoid, and oblong- 

 ellipsoid, mostly straight, except now in a. ^ mic. L. E. 



p. 30. 



a. fraxinea, Fr. ; wide- and at length long-lobed ; the lobes 

 sub-simple ; apothecia lateral. 



b. fastigiata, Fr. ; lobes shorter and crowded, dividing 

 dichotomously above ; apothecia sub-terminal. 



c. canaliculata, Fr. ; narrowed ; the channelled lobes dicho- 

 tomously- and at length much-branched and elongated ; apothe- 

 cia attached just below the deflexed, or geniculate tips. 



d. farinacea, Schser. ; flattened, smoothish ; now wider, and 

 sparingly branched, and now teretish and much branched; 

 finally filiform-attenuate and pendulous ; besprinkled with white 

 powdery soredia ; apothecia lateral, rare. 



Trees ; and d. also upon rocks ; very common in the Northern 

 States, and Canada, Muhlenberg Catal. 1818 ; and also south- 

 ward. California (only d.) and Mexico. A different view of 



this species may be found in the recent monograph of Nylauder 

 (Eecogn.) but the distinctions relied upon are far enough from 

 satisfactory, and admitted to be so, to some extent, by the author 

 himself. 



