Pertusaria. 107 



dilute caerulescens (n. 871). Epithecium albidum, KHO non rea- 

 gens (in coll. Glaz. n. 3272 in nonnullis apotheciis materia nigri- 

 cante aliena obsitum). Paraphyses ramoso-connexae, 0,ooi5 mil- 

 lim. crassae. Asci jodo caerulescentes. Sporae decolores, api- 

 cibus obtusis rotundatisve, membrana tenui (circ. 0,002 millim. 

 crassa), laevi. 



P. subvaginata Xyl. (Fl. 1864 p. 619, 1866 p. 290) ab hac specie diftert 

 apotheciis simplicibus simplicioribusre, KHO non reagentibus, KHO (Ca Cl 2 2 ) 

 riibescentibus, thallo neque KHO nee Ca Cl 2 2 reagente, et magis est similis 

 P. velatae (Turn.). 



Sect. II. Porophora (Meyer) Miill. Arg. Apothecia disco con- 

 tracto punctiformique. 



Porophora Meyer. Entw. Flecht. 1825 p. 326. Pertusaria sect. 2. Po- 

 rophora Miill. Arg., Lich. Beitr. (Fl. 1881) n. 705, 712. 



Stirps 1. Pertusae Miill. Arg. Pseudostromata subglobosa, 

 basi constricta. Disci demum bene impressi. 

 Miill. Arg., Lich. Beitr. (Fl. 1884) n. 715. 



4. P. Wulfenii (D. C) Fr.; Th. Fr., Lich. Scand. (1871) p. 

 312; Miill. Arg., Lich. Beitr. (Fl. 1884) n. 715; Hue, Addend. 

 (1886) p. 122. 



Tliallus sat tenuis aut sat crassus, subcontinuus aut areo- 

 lato-diffractus, verrucoso- vel verruculoso-inaequalis aut sat laevi- 

 gatas, stramineus aut glaucescenti-stramineus aut rarius partim 

 albescens, KHO (Ca Gl 2 2 ) aurantiaco-fulvescens. Pseudostromata 

 circ. 2,5 — 1 millim. lata, thallo concoloria, KHO (Ca Cl 2 2 ) auran- 

 tiaco-fulvescentia, depresso-subglobosa, laevigata, basi constricta, 

 apice demum vulgo late aut raro angustius impresso-concavo, 

 apothecia vulgo plura (circ. 1 — 10) continentia, ostiolis confertis 

 et vulgo pro parte demum confluentibus et discum dilatatum 

 difformem nigricantem impressum formantibus. Sporae vulgo 8:nae, 

 oblongae aut ellipsoideae, long. circ. 0,0 5 — 0,0 7 6 [ — „0,0 8 5"], 

 crass. 0,0 2 3 — 0,0 3 4 millim., membrana laevi, modice incrassata, 

 halone nullo. 



Ad corticem arboris prope Sitio (1000 metr. s. m.) in civ. 

 Minarum, n. 645. — Disci in specimine nostro solito minores, 

 KHO rubescentes. Paraphyses ramoso-connexae, 0,ooi5 millim. 

 crassae. Asci jodo caerulescentes. Sporae distichae aut irregu- 



