LICHENES ARABICI 



a cl. D' SGHWEINFURTH 



IN ARABIA YEMKNSI L E C ÏI QUOS D E T E R M I i\ A V I T 

 Dr J. MÜLLER 



1. Roccella Montagnei Bel. Voy. Ind. oi-., p. 17, t. XIII. fig. 4; ad ramulos. 



Schemsan supra Aden, alt. 1000-1775' (planta junior, hinc inde fertilis. 

 tenuis, sed in formam latani abieiis). 



2. Ramalina farinacea Acli. Univ.. [). 606: ramulicola. supra Aden ad 



Schemsan, 1000-1775' (ster.). 



3. Ramalina evernioides Nyl. Prodr. L. Gall. et Alger., p. 47; ranmlicola 



cum prsecedente supra Aden (ster.). 



4. Theloschistes chrysophthalmus v. subinermis Müll. Arg. L. B.. 



n. 180 ; ad ramulos Acacia? menachensis, prope Menacha, 7000' (antea 

 in Paraguay et in Australia orient, lecta). 



5. Xanthoria parietina Th. M. Fries Scand., p. 145; ad truucos Acacia^ 



me-nachensis prope Menacha, Yemen 7000' (planta omnino normalis). 



6. Parmelia caperata Ach. Meth., p. 217; supra saxa, El-Ajan supra Mena- 



cha, 8000' (ster, cseterum omnino normalis). 



7. Amphiloma ochraceo-fulvum Müll. Arg. L. B., u. 940; saxicola, El- 



Hausam in declivitate occident, montium Schibam ad 6000' (ster.). 

 Hucusque nonnisi in Somaliland lectum. 



8. Placodium fulgens v. bracteatum Müll. Arg. Lieh. Pers.. u. 14: ad 



torram inoiitium Schiliam prope Menacha, ad 7000'. 



9. Placodium concrescens Müll. Arg.; thallus ochroleucus. crassus. plagu- 



las 5-6 cm. latas formans, concrescenti-squamosus; squamfp totius pla- 

 gulas lateraliter incomplète connata?, non v. raro parce leviter imbri- 

 catse, plana3, teves, secus margines aut suturas albido-sorediosce v. 

 lobulis ochroleucis irregulariter globosis demum confluentibus ornât*: 

 apothecia ignota. — Affinis PL gypsaceo et PI. crcisso Müll. Arg., pra'- 

 sertim hujus varietati cetrarioidi (Psoromati crasso v. cetrarioidi 

 Mass. Sched.. n. 75). sed l'oluislitis. inagis flavicans (iit Parmelia cape- 



