132 EPHEBE. 



lecanorine; the coarctate disk punctiform. Spores ellip- 

 soid, colourless. Spermatia ellipsoid; on simple sterigmas. 

 Thallus coarsely filamentous, branched j the large gonimia 

 grouped finally more or less together outside of the medul- 

 lary parenchyma. 



* Apothecia (so far as known) immersed in the thallus. 



1. E. pubescens, Fr. ; thallus much-branched, rather rigid, 

 transversely somewhat wrinkled and scabrous, decumbent in 

 loosely intertaugled tufts ; from blackish-green becoming black ; 

 [apothecia immersed several together in siliquose swellings of 

 the thallus; the disk reduced to a point. Spores oblong-ellip- 

 soid, bilocular, colourless, ^~ mic.] Nyl. Syn. I, p. 90, t. 2, 1, 



& 17-20. Leight. I c. 



Rocks, throughout New England, and northward, Tuckerman 

 Syn. N. E. 1848. Greenland ? & cf Hornemann, fide Bornet. 

 New York, Peck. New Jersey, Austin. Probably throughout the 

 Appalachian system of mountains, as in Alabama, Peters. 

 Always as yet (with the above noted exception of Greenland) 

 seen here without apothecia, but occurring with spermogones, 

 which resemble the apothecia of the next species. Reliance is 

 hardly to be placed on the ordinarily dioecious character sup- 

 posed to distinguish this from the next (Nyl. Syn. I. c.} as com- 

 pare the E. Lapponica, Nyl. in Flora, 1875, which can scarcely 

 be said to differ at all from the present but in being monoecious. 



2. E. mammillosum (Lyngb.) Fr.; thallus simple; softer 

 than the last; the simple branches incrassated and spindle 

 shaped, and thickly mammillated on all sides ; apothecia un- 

 known. Harv. Brit. Algce, p. 153. 



Wet rocks near Norman's Woe, Gloucester, Mass., Prof. Far- 

 low. Both Agardh, and Harvey have inclined to consider this a 

 variety of the last, from which Fries (Summ. Veg. Scand.) has 

 distinguished it. 



* * Apothecia superficial, and globose. 



3. E. solida, Bora. ; thallus generally like that of the first 

 species in habit as in roughness, but much shorter, and perhaps 

 more uniformly stouter-branched and shrub-like, and growing in 

 smaller tufts ; black ; apothecia lateral and terminal ; the punc- 

 tiform disk at length evidently impressed ; with an obtuse mar- 



