552 PHYSCIACEAE. 



2. Pyxine Meissneri Tuck. Proe. Amer. Acad. 4: 400. 1860. 



On bark, New Providence : — tropical America and Africa, and East Indies. 



3. Pyxine Cocoes (Sw.) Xyl. Mem. Soc. Sci. Cherb. 5: 108. 1857. 



Lichen Cocoes Sw. Prodr. 146. 1788. 



Circinaria dissecta Fee, Essai Crypt. 127, pi. 30, f. 2. 1824. 



Pyxine dissecta Wainio, Ann. Acad. Sci. Fenn. A: 6^: 70. 1915. 



On bark. New Providence and Watling's Island : — widely distributed in the 

 warmer regions of both hemispheres. 



Wainio (l. c.) gives reasons for dropping the name "Cocoes" and adopts Fee's 

 name in its place. His reasons do not seem very convincing, and as the name 

 " Cocoes " has been in use so long and is so well recognized, it has seemed best to 

 retain it. 



3a. Pyxine Cocoes var. endoxantha Muell. Arg. Flora 65: 318. 188: 



uthera, Cat Islan 



PHYSCIA Ach. 



On bark. New Providence, Eleuthera, Cat Island : — distribution similar to that 

 of the species. 



Thallus gray-brown. 



Thallus closely adnate ; center areolate. 1. P. adgliitinata. 



Thallus merely appressed ; center subcontinuous. 2. P. obscura. 

 Thallus whitish or glaucous. 



Rhizoids black and hispid-branched. 3. P. hypoleuca. 



Rhizoids white or brown, and simple. 

 Lobes flat. 



Lobes 0.4-0.8 mm. broad. 4. P. alha. 



Lobes 1.2-3.0 mm. broad. 



Thallus without soredia. 5. P. dilatata. 



Thallus sorediate. 6. P. crispa. 



Lobes convex. 



Thallus without soredia. 



Lobes discrete and radiate. 7. P. steUaris. 



Lobes more or less imbricate and ir- 

 regular. 8. P. integrata. 

 Thallus sorediate. 8o. P. integrata xar. sorediosa. 



1. Physcia adglutinata (Flke.) Xyl. Syn. Lich. 1: 428. 1858. 



Lecanora adglutinata Floerke, Deutsch. Lich. 4: 7. 1815. 



On bark. New Providence : — widely distributed in temperate regions. 



2. Physcia obscura (Ehrh.) Xyl. Act. Soc. Linn. Bordeaux 21: 309. 1856. 



Lichen ohscurus Ehrh. Crypt, no. 177. 

 On bark. New Providence : — cosmopolitan. 



3. Physcia hsrpoleuca (Ach.) Tuck. Syn. X\ A. Lich. 1: 68. 1882. 



Parmelia speciosa var. hypoleuca Ach. Syn. Lich. 211. 1814. 

 On twigs. New Providence, on Soldier's Road : — widely distributed. 



4. Physcia alba (Fee) Muell. Arg. Eev. Mycol. 9: 136. 1887. 



Parmelia alha Fee, Essai Crypt. 125, pi. 30, /. 4. 1824. 



On bark. Lignum Vitae Cay, Berry Islands and New Providence : — widely dis- 

 tributed in tropical America. 



5. Physcia dilatata X^yl. Syn. Lich. 1 : 423. 1858. 



On dead wood, and on living shrubs. New Providence, at the Race Course and 

 Cat Island, vicinity of Port Howe : — Mexico ; Colombia ; Abyssinia. 



This species is probably more widely distributed than the stations cited would 

 indicate, but does not seem to have been recognized. According to original speci- 

 mens in the Museum d'Histoire Naturelle at Paris. P. dilatata has exactly the lobing 

 and texture of the common Phxiscia crispa, but without the soredia of that species. 

 From P. integrata, it differs in flatter lobes and in being membranaceous rather than 

 cartilaginous. 



