360 BOTANY OF SOCOTRA." 



1. CALLOPISMA. 



Callopisma (thallo crustaceo, gonidiis veris globosis, apotlieciis lecanorinis, sporis orculiformibus). 

 Callopisma, De Not. Nuovi Caratt. 24 pr. p. 

 Caloplaca, Th. Fries Lich. Arct. 118, et Heterol. 70. 

 Placodium, Stitzb. Beitr. 171, pr. p.; Tuck. Gen. 105, pr. p. 

 Lecanora, Ach. pr. p., Nyl. pr. p. 



This genus is represented in all regions. 



1. C. aurantiacum var. salicinum, Mass. Syn. Blasten. p. 11. 



Socotra. B.C.S. nn. 1357 pro parte, 1361 pro parte, 1365 pro parte. 

 Supra Wadi Digal, alt. 300 m., in cortice Balsamodendri. Schweinf. 

 Distrib. Very common almost everywhere. 



var. isidiosellum, Mlill. Arg. 



Lecanora aurantiaca var. isidiosella, Cromb. Licb. Bodrig. in Journ. Linn. Soc. xv. p. 437. 



Socotra. Cum varietate prsecedente crescens sed tantum sterilis. 

 Distrib. Rodriguez. 



*&' 



2. C. citrinum, Mass. Syn. Blasten. p. 13. 



Socotra. Thallus sterilis tantum adest. B.C.S. n. 1358 pro parte. 

 Distrib. Common, chiefly in temperate regions of the northern hemisphere. 



3. C. steropeum, Korb. Par. p. 65. 



Socotra. B.C.S. n. 1378 pro parte. Ad saxa quartzosa supra Wadi 

 Kischen, alt. 650 m. (sterilis). Schweinf. 



Distrib. Over Europe, and probably more widely dispersed. 



4. C. pyraceum, Mull. Arg. 



Caloplaca pyracea, Th. M. Fries Scand, p. 178. 

 Lecanora pyracea, Nyl. Scand. p. 179 pr. p. 

 Parmelia ccrina var. pyracea, Ach. Meth. p. 176. 



Socotra. Ad ramos. Schweinf. 



Distrib. Common in Europe. Some varieties of this species are found in 

 Australia, Egypt, and Palestine. 



2. LECANORA. 



Lecanora, Mull. Arg. Licb. Geneve, 42 (iuclus. Zeora, Korb. et Aspicilia, Mass.). 

 Lecanora, Ach. Lich. Univ. 77 pr. p., Nyl. pr. p. 



A rich genus well represented in all regions, with a great number of very 

 common species. 



