340 



tunda, elliptic», elongata et flexuosa, simplicia I. tridentata e. s. p.; PI. nivalis 

 sunt paullo majora et magis congesta conglomerataque. 



Subfam. 2. Arlhoniei. 



Apothecia maculaeformia, radiato-stellata 1. rotundata, immarginata ; pa- 

 raphyses in niassam grumoso-floccosam mutatae. 



63. Arthonia Ach. emend. 



Thallus crustaceus, uniforniis, vulgo hypophloeodes; apothecia macu- 

 laeformia, primitus aperta; sporae plus minus cuneato-oblongae, tetrablastae , 

 incoloratae. 



1. A. radiata (Pers.): crusta primuin hypophloeode, dein denudata, 

 tenuiter leprosa, albido-cinerascente 1. glaucescenti-olivacea; apotheciis inna- 

 tis, ex orbiculari angulosis, substellatim radiatis, atris, planis tumidulisve. 



Syn. Arthonia radiata Ach. Univ. p. 144. 



Opegrapha astroidea Wnbg. Lapp. p. 467, Snirft. Suppl. p. 142. — 

 Arthonia Ach. Syn. p. 6. 



Opegrapha atra * macularis Fr. L. E. p. 367. 



Opegrapha atra x — n Sch a er. Enum. p. 154. 



Arthonia vulgaris Mass. Rich. p. 48, K o erb. Syst. p. 290. 



Ex s. L. Su. n. 24. — Se h a er. n. 16, 517. 



In cortice Aini incanae et parcius Sorbi aucupariae Nordlandiae au- 

 stralis frequeuter (Smrft.), Finmarkiae orientalis rarius ex. gr. ad Polmak 

 (Wnbg.). 



Asci pyriformi-inflati; sporae senae 1. octonae, cuneato-oblongae, utrin- 

 que obtnsae, tetrablastae, luteolo-hyalinae, 0,oio — 18 mm. longae et 0,oo5 — 6 mm. 

 latae. 



2. A. pmictiformis (Ach.): crusta hypophloeode; apotheciis minutis, 

 subimmersis, sparsis, subrotundo-difformibus, atris, planiusculis. 



Syn. Arthonia pmictiformis Ach. Univ. p. 141, Syn. p. 4, Koerb. 

 Syst. p. 293. — Opegrapha Snirft. Suppl. p. 141. 



Arthonia atomaria Mass. Rich. p. 50. 



In cortice laevi ramorum Populi per Nordlandiam Saltensem (Smrft.). 



Asci pyriformi-inflati; sporae senae, tetrablastae, cuneato-oblongae, utrin- 

 que obtusae, luteolo hyalinae, 0,ou — 10 mm. longae et 0,on7 mm. latae. "Para- 

 physes capillares", de quibus mentionem facit Cel. Massa longo (le), non adsunt. 



3. A. trabinella n. s p. : crusta hypophloeode; apotheciis minutis, su- 

 perficialibus, sparsis, rotundatis, nigris 1. fusconigris, convexis. 



