218 J. Steiner, 



fuscae 15 — 21 [x lg., 7 — 1 1 [x lt. Sporoblastis subrotundis v. sub- 

 cordatis. 



Hymenium J mox fuscescit, asci fusce purpurascunt. Pyc- 

 nides punctiformes atrae, sterigmata ramosa, articulata, cellulis 

 mediocribus. P3^cnoconidia elongata, recta 3 — 4 [j, lg., 1 — 1-2 [i lt. 



Basalticola in reg. Athi-Plains. 



Steht der R. trachytica Mass. Arid. exs. 493 nahe, ist aber 

 durch den Thallus und die helleren Apothecien verschieden. 

 R. teichophila Nyl. und teicliophiloides Nyl. haben viel grössere 

 Apothecien und grössere Sporen. 



17. Caloplaca (Sect. Amphiloma) rubelliana Flag. L. p. 33. — 



Ach. Univ. p. 376. 



Omnino cum planta europaea congruens, thallus hie inde 

 spurie macrior. 



Basalticola in reg. Athi-Plains crebre adest. 



18. Caloplaca (Sect. Eucaloplaca) cinnabarina Stnr. — Ach. 



Univ. p. 402. 



Planta typica basalticola in reg. Athi-Plains minime rara. 



19. Caloplaca (Sect. Blastenia) polioterodes Stnr. 



Thallus crustaceus submediocris, diftracto-areolatus albus 

 V. albissimus, madefactus glaucus, hyphothallo atro minus per- 

 spicuo. Areolae ad ambitum thalli majores, planae (0*5 — 0-7 iniii 

 lt.) centroversus ulterius diffractae minores, pycnidibus nigro- 

 punctatae, v. rimis obscuris, initia novae diffractionis, nigro- 

 sulcatae. Thallus KHO lutescit, caeterum reagentiis solitis non 

 mutatur. Apothecia primum immersa mox sedentia, orbicularia, 

 ad 0-4 11WI lt., disco piano, v. cinnamomeo-fusco v. obscurato, 

 margine integro, semper nigro. 



Paraphyses filiformes, tenuiores supra capitata et con- 

 natae epithecium fuscum v. e fusco plus minus obscure viride 

 formant, KHO impure purpurascens. Excipulum, in superiore 

 parte gonidiis privatum, extus nigro-viride KHO non mutatur. 

 Hypothecium incolor. 



Asci lanceolati, supra incrassati ca. 46 [x lg., 21 [x lt. Sporae 

 octonae parvulae, incolores ellipticae, placodimorphae, septo 



