THE BRYOLOGIST 



Vol. XVI May 19 13 No. 3 



LICHENS OF MOUNT KATAHDIN, MAINE 



R. Heber Howe, Jr. 



On July 18, 1911, I left Norcross, Maine, for the summit of Mt. Katahdin^ 

 (5,385 ft.). I crossed lakes Pemadumacook and Ambajejus to Tuck's camp on 

 the steamer, and proceeded from there by canoe up the west branch of the 

 Penobscot River to Sourdnahunk Falls, where I took the trail to Hunt's Camp on 

 Kidney Pond, arriving there July 19. On July 21, I started for Katahdin, 



I sleeping that night on its side, with the intention of spending the next day on the 

 summit. After reaching the tableland, however, a terrific thunderstorm with 

 cold rain and hail drove me to shelter beneath a boulder and I descended, after 

 two hours of most disagreeable collecting, enveloped in dark clouds. I 



I reached Hunt's Camp at dusk and returned to Norcross on July 24. 



i During this expedition I collected lichens all along the route and the speci- 



mens are now preserved in my herbarium. In the present list I am interpolating 

 the species collected on Katahdin by the Rev. J. Blake and recorded in F. L. 

 Harvey's Lichens of Maine. ^ I am grateful to Drs. Riddle, Hasse, and Scriba 

 for valuable aid rendered in the determination of the Stereocaulons, crustose 

 species, and Cladonias respectively. 



Sub-Order: Cyclocarpineae 



Group: Radiatae 



Family : Usneaceae. 



1. Usnea plicata (L.) Web., Ambajejus Lake — sterile, on trees. 



2. Usnea florida (L.) Web., Ambajejus Lake — fertile, on trees. Represents 

 phase U. subfusca Strt. 



3. Usnea longissima Ach., Ambajejus Lake — sterile, on trees. Represents 

 phase tenuis Th. Fr. 



4. Usnea trichodea Ach., West Branch — sterile, on dead trees. 



5. Letharia thamnodes (Flot.) Hue, Katahdin (4,000 ft.), on trees — sterile; 

 Ambajejus Lake, on trees — sterile; West Branch, on trees — sterile. 



6. Ramalina fastigiata (Pers.) Ach. emend., Ambajejus Lake, on trees — • 

 fertile. 



7. Ramalina canaliculata (Fr.) Herre, West Branch, on conifers — fertile. 

 [Cetraria islandica (L.) Ach., Blake] 



1 Ktaadn. 



2 Harvey, F. L. Contribution to the Lichens of Maine— L Bull. Torn Bot. Club 21 : 389- 

 393. 1894. 



