ALECTORIA. 45 



3. A. Fremontii, Tuckerm. ; thallus pendulous, elongated, 

 compressed-terete, smooth ; brown ; irregularly and remotely 

 much-branched, the flexuous branches more or less dilated and 

 lacunose below, and passing above into long-attenuated, capillary, 

 finally densely intertangled summits ; apothecia smallish to mid- 

 dling sized; disk yellow-pruinose, soon convex, and the thin, 

 entire margin disappearing. Spores rounded-ellipsoid, without 



colour, ^ mic. Tuckerm. Suppl 1, 1. c. p. 422; Exs. n. 52. 



Nyl. Syn. 1, p. 280. 



On the branches of coniferous trees, in California (Fremont) 



Tuckerman 1. c. 1858. Oregon, Prof. Newberry. The lichen 



was first found (in 'British North America') by Drummond 

 Herb. Tayl.). 



4. A. ochroleuca (Ehrh.) Nyl.; thallus compressed -terete, 

 divaricately branched; straw-coloured. Spores in twos and 



fours, ellipsoid, brown, ^ mic. Nyl. Syn. l,p. 281. Ever- 



nia, Fr. L. E. p. 22. 



a. rigida, Fr. ; thallus tufted, erect, rigid, finally much- 

 branched, the attenuate, much-divided, reflexed summits black- 

 ening; apothecia sub-terminal, middling-sized. 



* osteina, Nyl., thallus (prostrate) smaller and paler; apo- 

 thecia lateral. 



**nigricans, Ach. ; the whole thallus more or less at 



length livid, and blackening. A. nigricans, Nyl. Lich. 



Scand. p. 71. Th. Fr. Lich. Scand. p. 22. 



b. cincinnata, Fr. ; thallus prostrate, sarmentose, rigid ; the 

 here and there irregularly dilated and flattened branches lacu- 

 nose, and the long-attenuated summits mostly of the same col- 

 our ; apothecia as in a. 



c. sarmentosa, Nyl. ; thallus sarmentose-pendulous, much- 

 elongated, softish ; below remotely branched, attenuated above 

 into long, much-divided, densely intertangled, finally capillary 

 extremities of the same colour; apothecia smallish to middling. 



Arctic and alpine, mostly, except c, which inhabits high 



mountain forests. a, on the earth, Arctic America, fertile 



Richardson), Hooker L c. 1823. Newfoundland, Despreaux. 

 Vancouver's Island, fertile, Herb. Hook. Peak of Orizaba, Mex- 

 ico, Nylander Syn. * On the earth, high mountains of Mexico, 



