552 PHYSCIACEAE. 



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



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



3. Pyxine Cocoes (8w.) Nyl. Mem. Soo. Sci. Cherb. 5: 108. 1857. 



Ziehen Cocoes Sw. Prodr. 146. 1788. 



Circinaria dissecta Pee, Essai Crypt. 127, pi. SO, f. S. 1824. 



Pyxine dissecta Wainio, Ann. Aead. Soi. Eenn. A: 6': 70. 1915. 



On barli, New Providence and Watling's Isiand : — widely distributed in the 

 warmer regions of both hemispheres. 



Wainio (J. a) gives reasons for dropping the name "Cocoes" and adopts PSe'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. Elora 65: 318. 1882. 



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

 of the species. 



2. PHYSCIA Ach. 



Thallus gray-brown. 



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



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

 Thallus whitish or glaucous. 



Ehizolds black and hispid-branched. 3. P. Tiypoleuca. 



Bhizoids white or brown, and simple. 

 Lobes flat. 



Lobes 0.4—0.8 mm. broad. 4. P. alia. 



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. stellaris. 



Lobes more or less imbricate and ir- 

 regular. S. P. integrata. 

 Thallus sorediate. 8a. P. integrata var. sorediosa. 



1. Physcia adglutlnata (Pike.) Nyl. Syn. Lieli. 1: 428. 1858. 



Lecanora adglutinata Ploerke, Deutsoh. Lich. 4: 7. 1815. 



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



2. Physcia oTsscura (Ehrh.) Nyl. Act. Soo. Linn. Bordeaux 21: 309. 1856. 



Lichen oTiscurus Ehrh. Crypt, no. 177. 

 On bark. New Providence : — cosmopolitan. 



3. Physcia hypol6uca (Aeh.) Tuck. Syn. N. A. Lich. 1: 68. 1882. 



Fannelia speciosa var. hypoleuca Aoh. Syn. Lich. 211. 1814. 

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



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



Parmelia alha Pee, Essai Crypt. 125, pi. SO, f. i. 1824. 



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

 tributed in tropical America. 



5. Physcia dilatjlta Nyl. 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 Physcia crispa, but without the soredia of that species. 

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

 cartilaginous. 



