﻿582 Howe: Genus Teloschistes in North America 



Substrata: Trees, shrubs and rocks (type). 



Geographical distribution: Occurs commonly in the 

 Austral and Transitional Zones from Ontario to North Carolina, 

 west to Ohio, IlUnois, Iowa, Wisconsin, Minnesota and California, 

 and southward. 



Observations: This species has the widest distribution of the 

 members of the genus in our area, and is easly recognized. 

 Though Dr. Wainio cites Michaux's Physcia exilis as a species on 

 account of its pale thallus and eciliate apothecia, these characters 

 are only phases of this plant. The color of the thallus is rarely 

 pure yellow in true T. chrysophthalmus, and is not so in the type. 

 Neither did Linnaeus describe it as yellow. The condition with 

 ciliate apothecia is such a variable development that it hardly 

 warrants even varietal recognition. 



Exsiccati: Cummings, No. Amer. Lichens ig, 84, py, 98; 

 Howe, Lich. Novae Angliae 54; Tuck. Lich. Amer. Sept. 80, as 

 Parmelia chrysophthalma. 



Teloschistes villosus ' (Ach.) Norm. 

 Parmelia villosa Ach. Meth. Lich. 254. 1803. 

 Teloschistes villosus Norm. Nyt. Mag. Naturv. 7: 228. 1853. 



Type: In the Acharian herbarium, Helsingfors, Finland. 



Type locality: "Peru," etc. 



Original description: "Thallo membranaceo caespitoso 

 villoso-hispido cinereo subtus albido nudo canaHculato, laciniis 

 Unearibus ramosis subflexuosis; scutellis lateralibus rubris." 



Figure: Ach. Lich. Univ. pi. g, f. 8. 1910. 



Diagnosis: Thallus suherect, 'compressed-canaliculate, hispid, 

 apothecial disk red. 



Description (typical): Thallus caespitose (alt. 4 cm.), sub- 

 rigid, compressed-canaliculate, cinereus; cortex glabrous, hispid 

 above ; dichotomous (maximum width 2 mm.) , laciniate, attenuate, 

 apices subterete. Apothecia uncommon, sub terminal, concave, 

 marginate, disk red (maximum diameter 3 mm.). Spores simple, 

 11-16X 4.5-6 M. 



telia chrysophthalmus /3 exilis Tuck., 

 ins f. cinerascens Miill. Arg. (Bot. 



