﻿580 Howe: Genus Teloschistes in North America 



containing eight spores; paraphyses gelatinous, slender, apices 

 branched and articulate. Spores simple or polari-bilocular,* hya- 

 line, ellipsoid. Spermagones oblong-ellipsoid. Sterigmata simple. 

 Spermatia cylindrical. 



Observations: There are but three species of the genus com- 

 mon in North America, and only one of these has a wide distribu- 

 tion throughout the area. 



Thallus glabrous. 



Laciniae slender, terete T. flavicans 



Laciniae thickened, compressed T. chrysophthalmus 



Thallus hispid T. villosus 



Teloschistes flavicans (Sw.) Norm. 

 Lichen flavicans Sw. Nov. Gen. Spec. PL Prod. 147. 1788. 

 Teloschistes flavicans Norm. Nyt. Mag. Naturv. 7: 229. 1853. 

 Theloschistes chrysophthalmus b. flavicans Wallr. of Tuckerman. 



Type: Untraced. 



Type locality: "Jamaica." 



Original description: "foliaceus, Hneari-teretiusculus ramo- 

 sus fulvus, scutelHs planis marginaUbus concoloribus." 



Figures: Swartz, Lich. Amer. pi. 2. 1811. 



Diagnosis: Thallus prostrate, slender, terete, apothecial margins 

 eciliate. 



Description (typical) : Thallus caespitose or prostrate, rarely 

 subpendulous (alt. 5 cm.), subrigid, terete or subterete, yellow or 

 pale virescent; cortex glabrous, rarely puberulent, often papillo- 

 soraliate (white), sublacunose ; 6m«c/r65 thyrsoid-entangled (maxi- 

 mum width 2 mm.), apices attenuate, flexuous, fibrillose. Apothecia 

 common (except at northern limit of range), lateral, concave, 

 marginate, margins eciliate, disk concolorous to vitelHne (maximum 

 diameter 3 mm.). Spores polari-bilocular, 6.5-12 X 12-20 ju. 



Contingent phases: Unobserved. 



Substrata: Trees and shrubs; "rocks and earth" Herre. 



Geographical Distribution: Not uncommon in the Austral 

 Zone. It extends on the Atlantic Coast from Newfoundland to 

 Nantucket, Bermuda and Florida, and west to the Santa Cruz 

 Peninsula, California. It occurs also throughout the West Indies 

 and northern South America. 



* Rarely tetrablast. ~~ """ 



