202 PROCEEDINGS OF THE AMERICAN ACADEMY 



f. 14, was constituted on a Lichen which Fries referred to this figure 

 and description of Dillenius, whose own specimens were sent him from 

 Pennsylvania, by J. Bartram. I have not seen Fries's description, but 

 he says incidentally (Lichenogr. p. 478) that his specimens are (like 

 those of Dillenius) infertile, and that the genus of the Lichen is there- 

 fore doubtful. 



2. E. juhata, Fr. Thallus terete, smooth, much branched, black- 

 fuscous (or palish), apices simple ; apothecia innate-sessile, entire, of 

 the same color with the thallus. Fr. Lichenogr. p. 20. — «. bicolor, 

 Fr. ; th. erectish, fruticulose, branches divergent, apices cinereous- 

 fuscescent. Cornicularia hicolor, Ach. — (i. chalybeiformis, Ach. ; 

 th. subfilamentous, decumbent, somewhat rigid, divergent (often white- 

 sorediiferous), apices oftener palish. Alectoria jubata, var. chalyb., 

 Ach. Cornicularia Jibrillosa, Halscy, Lich. N. Y. I. c. non Ach. 

 — y. implexa, Fr. ', th. filamentous, pendulous, very much branched, 

 entangled, sofiish, apices of the same color. Lichen jubatus, L. — 

 8. setacea, Ach. ; th. filamentous, rather slender, very long, pendulous, 

 somewhat simple, frequently sorediiferous. Alect. jubata., var. setacea., 

 Ach. Setaria trichodes, Michx. Alect. trichodes, Pylaie Voy. p. 17. 



Very common : «, trees on high mountains, fertile ; and on the 

 ground in alpine districts, infertile ; White Mountains. Arctic America, 

 R. Br. (Ross's Voy.). — /5, old rails, stones, and trees, sterile; com- 

 mon in New England, Arctic America, R. Br. (Scoresby's Arc. Re- 

 gions), Rich. — ;/, trees in mountainous and subalpine districts, infer- 

 tile ; New England and westward. Arctic America, Rich. — 8., dead 

 wood, Canada, Michaux ! Newfoundland and northward, J/erS. Hook. ! 

 Michaux's Lichen is extremely delicate, but apparently not distinct. 



3. E. divergens, Fr. Th. somewhat angular, dark-chestnut, white- 

 dotted ; branches elongated, flexuous ; apices attenuated, forked, of the 

 same color ; apoth. innate-sessile, crenulate, disk of the same color. 

 Fr. Lichejiogr. p. 21. Cornicularia, Ach. 



On the earth, alpine and arctic regions. Newfoundland, Herb. De- 

 lessert. Bear Lake, Rich., Hook. ! (Parry's Sec. Voy.). 



4. E. ochroleuca, Fr. Th. teretish, smoothish, ochroleucous (and 

 palish), axils compressed-sublacunose, irregularly branched, apices at- 

 tenuate, subfibrillose ; apoth. innate-sessile, at length repand, disk livid- 

 fuscous. Fr. Lichenogr. p. 22. — «. rigida, Fr. ; th. suberect, fru- 

 ticulose, rigid, ochroleucous, apices reflexed, blackish. Comic, ochro- 



