92 STICTA. 



1. S. amplissima (Scop.) Mass.; thallus ample> orbicular, 

 appressed, cartilagineous-coriaceous, smooth or with age trans- 

 versely wrinkled ; cinereous-glaucescent ; beneath tawny dark- 

 ening toward the centre, villous; the elongated lobes either 

 wide and for the most part compacted, or now narrowed and 

 the sinuate lobation marked ; apothecia scattered, ample to 

 large ; the disk chestnut ; the entire margin at length in flexed. 

 Spores acicular, from bi- at length quadrilocular, soon colourless, 



^ mic. Parmelia, Schcer. Spicil. p. 450. Sticta glomeruli- 



fera, Fr. L. E. p. 54. Tuck. Exs. n. 105. Eicasolia, Nyl. Syn. 1, 

 p. 368. 



Trunks and rocks, common at the north, from New England, 

 Tucker man, Enum. 1845, to Canada, Macrae, and Arctic Amer- 

 ica (Farm, herbacea), Richardson. Pennsylvania, Muhlenberg in 

 Jierb. Willd. Ohio, Lea. Wisconsin, Lapham. And it follows 

 the mountains southward to Virginia, Curtis ; and North Caro- 

 lina, Ravenel. So far as seen the southern lichen is smallish, 



and now suggestive of the closely allied S. erosa. 



2. S.herbacea (Huds.) Ach. ; thallus membranaceous, ap- 

 pressed, smooth; from pale- at length dark-brown; beneath 

 mostly pale, villous ; lobes sinuately repand, with rounded tips ; 

 apothecia scattered, ample; the inflexed margin sub-crenate. 

 Spores fusiform, 2-locular, ^ mic. Del. Stict. p. 132, t. 16, 



/. 56. Fr. L. E. p. 55. Eicasolia intermedia, Nyl. Syn. 1, p. 

 369. 



Trunks, Orizaba, Mexico, F. Miiller in herb. Willey. 



Scarcely differs from the European species ; nor is any differ- 

 ence of importance noted in Nylander's cited description. The 

 interest of the lichen lies in its affording us at last a good 

 American representative of the European plant. Our northern 

 . amplissima is always without the "glomerules" so long 

 taken for characteristical of the lichen in Europe, and was re- 

 ferred therefore, without doubt, in the catalogues of Muhlen- 

 berg, Halsey, and Hooker, who do not otherwise recognize it, 

 to the really thinner and less divided S. herbacea ; from which 

 we now know it to be also separated by the spores. And the 

 spores decide equally the place of certain wider-lobed conditions 

 of the southern and tropical S. erosa, which might pass, and 

 have passed with very experienced lichenists, for the present 

 species. 



