PYRENULACEAE. 525 



2. ARTHOPYRENIA Mass. 



Spores two-celled. 



Asci cylindrical, spores uniseriate. 



Spores 15-30 x7-13. 1. A. gemmata. 



Spores 12-15 x 5-7 w . 2. A. biformis. 



Asci clavate, spores 2- to 3-seriate. 

 Perithecia spreading at the base. 



Perithecia peltate, flattened, and thalline-suffused. 3. A. planorbis. 

 At least the center of the perithecium elevated and 

 nudate. 

 Spore-cells equal in size. 4. A. Cinchonae. 



Spore-cells unequal. 5. A. fallow. 



Perithecia not spreading at the base. 6. A. consanguinea. 



Spores four-celled. 



Perithecia more or less covered by the thallus. 



Thallus thin, the perithecia merely suffused. 3. A. planorbis. 



Thallus thick, the perithecia imbedded with the tips 



emergent. 7. A. tumida. 



Perithecia superficial and nudate. 8. A. contendens. 



1. Arthopyrenia gemmata (Aeh.) Muell. Arg. Mem. Soc. Phys. Hist. Nat. 



Geneve 16: 428. 1862. 



Lichen gemmatus Aeh. Lieh. Suec. Prodr. 17. 1798. 



On bark, New Providence : widely distributed in temperate regions of both 

 hemispheres. 



2. Arthopyrenia biformis (Borr.) Muell. Arg. Flora 66: 306. 1883. 



Verruca-rid. biformis Borr. in Engl. Bot. Suppl. pi. 2617. 1829. 



On bark, New Providence, on the Farringdon Road : widely distributed in the 

 temperate regions of both hemispheres. 



3. Arthopyrenia planorbis (Aeh.) Muell. Arg. Flora 66: 288. 1S83. 



Verrucaria planorbis Aeh. Syn. Lieh. 92. 1814. 



Arthopyrenia indusiata Muell. Arg. Flora 66: 288. 1883. 



Arthopyrenia fallacior Muell. Arg. Bot. Jahrb. 6: 404. 1885. 



On bark. Great Bahama, and New Providence : Cuba : Anegada ; Costa Rica. 



4. Arthopyrenia Cinchonae (Aeh.) Muell. Arg. Flora 66: 287. 1883. 



Verrucaria Cinchonae Aeh. Syn. Lieh. 90. 1814. 

 DidymeUa Cinchonae "vVainio* Lieh. Bres. 2: 233. 1890. 

 Arthopyrenia planior Muell. Arg. Bot. Jahrb. 6: 404. 1885. 



On bark. Great Bahama, New Providence. Little San Salvador, Great Exuma, 

 Watling's Island: widely distributed in tropical America. 



5. Arthopyrenia fallax (Nyl.) Arnold, Flora 68: 159. 1885. 



Verrucaria epidenmidis var. fallax Nyl. Bot. Xotis. (1852) 178. 



On bark. Great Bahama, at Barnett's Point, and New Providence, near Seven 

 Hills : widely distributed in the temperate regions of both hemispheres. 



6. Arthopyrenia consanguinea Muell. Arg. Bot. Jahrb. 6: 404. 1885. 



On bark. Eleuthera Point: Florida: Cuba. 



Very closely related to forms of Arthopyrenia epidermidia (Fr.) Mudd. 



7. Arthopyrenia tumida Muell. Arg. Flora 67: 669. 1884. 



On bark. New Providence, at Waterloo Coppice : Isle of Tines. Cuba : and Brazil. 



8. Arthopyrenia contendens (Nyl.) Muell. Arg. Flora 66: 317. 1883. 



Verrucaria contendens Nyl. Act. Soe. Sei. Fenn. 7: 492. 1863. 



On bark of Jacquinia keyensis, The Bight, Cat Island: Colombia; Brazil. 



