RAMALISTA. 21 



due to the finally distinct and solid cords into which the 

 medullary filaments more or less pass : these cords becom- 

 ing either (as in the majority of species) mostly united with 

 the cortical layer; or (in E. homalea) dispersed rather 

 through the cottony medullary; or finally (in the species 

 last-named, and especially in R. ceruchis) now collected into 

 something like an axial column, within the cottony portion. 

 The analogy of Eamalina with Usnea is seen thus to be not 

 confined to external features. 



* Medullary cords free of the cortical layer, and at length 

 axial ; or indistinct. Spermogones black. 



1. E. ceruchis (Ach.) De Not. ; thallus tufted, terete, or com- 

 pressed-terete, smooth, but soon and at length deeply pitted 

 and wrinkled; somewhat simple or sparingly branched, the tips 

 of the branches often attenuate ; apothecia middling to ample, 



lateral. Spores oblong, ^ mic. Borrera, Ach. Lich. p. 504. 



Eamalina, De Not. Framm. Nyl. Syn. 1 , p. 289 ; Eecogn. p. 8. 



Trees and rocks, coast of California (C. Wright] Tuckerman 



Gen. 1872. An infertile form upon dead wood, Sta. Cruz, D. 



Anderson, is distinguished by large, lateral and capitate, grey 



soredia (/. cephalota}. E. Combeoides, Nyl. (Eecogn. Eamal. 



p. 9) with quite simple, podetiiform thallus, and commonly 

 terminal, now clustered apothecia, grows with the next spe- 

 cies in California (Bolander) but, though certainly marked, is 

 inseparable from South American forms (Terra del Fuego, 

 Wilkes exp.) which appear fully referable to E. ceruchis. Speci- 

 mens of the present species commonly, and at length densely 

 floccose ; the medullary filaments escaping largely through the 

 rents of the easily broken cortical layer. 



2. E. homalea, Ach. ; thallus tufted, compressed and two- 

 edged, smooth, but finally wrinkled; sparingly and irregularly 

 branched, the branches attenuate and at length spreading and 

 the tips teretish ; apothecia middling to ample, marginal, now- 

 dilated and flexuous. Spores oblong, -^j- mic. Ach. Lichenogr. 



p. 598. Nyl. Syn. p. 289 ; Eecogn. p. 9. 



Rocks; coast of California (Menzies). Ach. L. U. 1810. 



E. testudinaria, Nyl. (Eecogn. p. 10) from California, is not dis- 

 tinguishable. 



