154 



18. P 1 a c d i a in d i s pe r s o - a r o o I ca t u ni Korl>, S yst. 



p. 117; in Kuh Rul, alt. nrc. 12000 pod. 



19. Placed iuni per si cum Miill. Arg.; ihallus ut in 

 TJ, disperso-areolato Kr>il>, albidulns v. hinc nide in ros(iun 



vergens , amhitii brevissiine radiatini lobatus et crasyius- 

 cuhia ; apotliecia in areolis centro nnibonatis solitaria, 1 nun 

 lata; margo integer^ I'ulvesconti - fuscus; discus nigro-fuscus, 

 riudu8 ; epilbeciuni olivaccuni , lamina caettruiu hyaliita et 

 mollis; j:)arapliyscs crassae, suporne articulalac; sporae 8-nat^, 



ellipsoidcae, 12 — 20 // longao et 7 — 9 /< latae. — A specie 

 comparata statini rccedit ciisco npotbcciorum et dciu magni- 

 tudine ^purarum. — Ad saxa durissima montis Kuii l\)tsclial. 



20. Placodiuni radio sun) Mass. Kic. p. 22; Lichen 



radiosKS Iloffm. Ennm. p. 62. t. 4. F\g, 5 (1784); Lichen 



circinatus Pers. (171)4); ad saxa arenaeea prope Khonar 

 Takhte. 



21. P laco dium crassum (Acb.) Miill, Arg. Licli. 

 Geneve p. 38, var melaluma; Lccanora crassa v. melaloma 



Ach. Univ. p. 414; ad saxa pleruuique calcarea prope 

 Schiras, ad Kasrun et in monte Kuh Toscbal. 



V. deserti Miill. Arg. Lich. aegypt. SuppI, II. 

 n. 10; ad terram sabulosam prope Bijscliir, paice tertilis. 



22. PI aco d i ij m (sect. Acarospora) Stapfianum 

 Miill. Ar^. ; tballus virescenti-flavus, squamulosus; squamulae 

 contertae, subcontiguac, obtuse angulosae et nndulato-inae- 

 quales, hinc inde imbricatae, margine obtusae, periphericae 

 niodice radiantes, crenalao ct inte^ra", omnes crassac^ supra 

 laevigatae, undique adnatac, crustam circ. 2-3mui crassam 

 t'ormantes ; npotliecia 1^/a — 2 nun lata, innata, urceolari- 

 concava, margine ipso squamaium tun»cnte et incurvo crasso 

 obtuse angulato v. undulato thallino-marginata, et bine inde 

 margine zeorino tcnui fusco praedita; discus vircnti-nigcr v. 

 fusco-niger, nurlus, opacus; epilhecium nigro-fuscura, reliqua 

 omnia intus hyalina; asci elongate- obovoidei , creberrimc 

 polyspori ; sporae tantum 2 — 3 (f lon^^ae, glubosae et globoso- 

 ellipsoideae. — Hat)itu ad Fl. citrinnm ( Tayl.) bene accedit, 

 sed lotus Lichen omnibus partibus validior et discus aliter 

 coloratus est. Pulcliia specie's sed parce tantum lecta, egrcgio 

 detect ori grato animo dicata. — Ad saxa calcarea montis 

 Kuh Zut'a prope Ispahan. 



23. Placed ium (s. Acarospora) cer vinum Miill. 

 Arg.; Lfcanora cervbia Ach. Syn. p. 124. pr. p.; Acarospora 

 cervina Kerb. Syst. p. 154; ad saxa calcarea in monte Kuh 

 Totschal et in Kuli bamu (haec ulterior sterilis). 



