384 



1. P, muscicolum (S\v.): thallo teretiusculo, pulvinato, intricate, fusco; 



apotheciis adpressis, primo concavis, dein planiusculis, disco obscure fusco. 



Syn. Collema muscicolum Ach. Univ. p. 660, Syn. p. 328, Schaer. 



Enum. p. 248 et tab. 10. f. 1. Lichen Wnbg. Lapp. p. 442. Lep- 



togium Fr. Fl. Scan. p. 293. Polychidium Mass. Mem. p. 89, Koerb. 



Syst. p. 421. 



Ex s. L. Su. n. 297, 306. Schaer. n. 403. Zw. n. 176. 



Supra muscos tenuiores rupium Nordlandiae Finmarkiaeque inferal- 

 pinae passim copiose; in Islandia (herb. J. Vahl). 



Asci inflato-clavati, paraphysibus validiusculis, laxe cohaerentibus, apice 

 fuscescentibus cincti; sporae octonae, plus minus fusiformes, 0,ot6 24 mm. longae 

 et 0,0056 mm. latae. 



Fam. XV. PYRENOPSIDEI. 



'I'h. ill i is crustaceus, uniformis. Apothecia urceolata, margine thallo- 

 de cincta. 



91. Pyrenopsis Nyl. 



Thallus crustaceus, matrici adnatus, intus confuse cellulosus; apothe- 

 cia urceolata, disco minutissimo, excipulo thallode marginata; sporae octo- 

 nae, simplices, subellipsoideae, hyalinae. 



1. P. lignyota (Wnbg.): crusta granuloso-areolata , laxe adnata, hu- 

 mida atroviridi, sicca aterrima; apotheciis punctiformibus, inn at is, concolo- 

 ribus, margine thallode elevato integerrimo. 



Syn. Verrucaria lignyota Wnbg. in Ach. Meth. Suppl. p. 20, Ach. 

 Univ. p. 287. 



Verrucaria fuliginea Wnbg. Lapp. p. 887. Pyrenula Ach. Syn. 

 p. 121. Collema Smrft. Suppl. p. 118. Pyrenopsis Nyl. Syn. p. 97. 

 T/ielignya Mass. Framm. p. 18. 



In rupibus aqua nivali suffusis Nordlandiae Finmarkiaeque passim, his 

 terris, ut videtur, priva. 



Asci cylindrico-clavati, paraphysibus validis, apice usque ad medium fere 

 coerulescentibus cincti; sporae ellipsoideae, 0,oi? 15 mm. longae et O.oos mm. 

 lalae. Paraphyses minime stint "non regulares" sed aeque regulares ac apud 

 maximam lichenum partem. 



2. P. haematopis (Smrft.) Th. Fr.: crusta^iffracto-rimosa, granulato- 

 rugosa, inaequabili, laxe adhaerente , humida obscure sanguineo-rufa, sicca 

 sanguineo-fuscescente 1. rufo-nigricante ; apotheciis minutis, superficialibus , 

 urceolatis, disco minuto, thallo concolori 1. paullo obscuriore, margine thal- 

 lode crasso, elevato, integerrimo. 



