THE BRYOLOGIST 



Vol. XVI November 1913 . No. 6 



NORTH AMERICAN SPECIES OF THE GENUS RAMALINA.— PART II. 



R. Heber Howe, Jr. 

 Series: Tenuicorticatae ser. nov. 



Medulla arachnoid, cortex thin (20-30^1), hyphae not divaricate above 

 gonidia. 



Key to the Series Tenuicorticatae 



Thallus with wide reticulate sorediate laciniae 



Laciniae with palmate-laciniate apices ; crispatula 



Laciniae without palmate-laciniate apices Duriaei 



Key to the Series Myelopoeae (In Part) 



Thallus without wide, reticulate laciniae 

 Laciniae compressed, non-linear 

 Thallus rigid, soredia granulate 



Apices hlunt polymorpha 



Apices acuminate var. emplecta 



Thallus subflaccid, soredia powg^ry pollinaria 



Subpulvinate var. humilis 



Laciniae subcompressed, linear 

 Apices simple 



Laciniae robust, branched, concolorous, KOH+ calicaris 



Laciniae slender, simple, black above, KOH — cuspidata 



Apices multifid-sorediate, KOH+ subfarinacea 



Ramalina Duriaei (DeNot.) Bagl, 



Synonymy: Ramalina pollinaria var. Duriaei DeNot. Frammenti Lich. Giorn^ 

 Bot. Ital. 2: 216. 1846. 

 Ramalina Duriaei Bag]. Lich. In Sard., Giorn. Bot. Ital. 11: 58. 1879. 

 Non Ramalina evernioides Nyl. Proc. Lich. Gall, et Agl. 47. 1857, 

 also Act. Soc. Linn. Burdigal 21: 293. 185'/. = Ramalina 

 maciformis Del. 

 Ramalina evernioides of many authors, 

 Type: Not traced. The type of R. evernioides is in the Museum d'Histoire 

 Naturelle, Paris, not in the Cosson Herbarium, fide author.^ 



1 Type locality: "prope Gabes," Tunis, Africa. (On earth and rocks.) 



Original description: "thallo albo vel albido, sorediis vix uUis, crebre minuteque reticulatim 

 rugoso, apotheciis pallidus demum majusculis. " 1. c. 



The September number of The Bryologist was published Nov. 22, 1913. 



