Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 203 



Ach. Lich. Suec. Prodr. (1798) p. 15 p. p. (conf. sub D. punctiformi, 

 p. 209). 



Thallus et hypothallus indistinctus. Apothecia dispersa, 

 verrucas formantia hemisphaericas, nigricantes, nudas, vulgo 

 leviter nitidas. Perithecium fusconigrum, dimidiatum, lat. 

 0.360—0.470 mm, margine ostiolari haud prominente, ostiolo 

 circ. 0.045 mm lato. Asci cylindrici aut subcylindrici, raem- 

 brana parte superiore sat tenui. Paraphyses bene evolutae, 

 numerosae. Sporae distichae, ovoideae aut ovoideo-oblongae, 

 1-septatae, long. 0.oi6 — O.022, crass. O.006— O.009 mm, membrana 

 modice incrassata, septo vulgo in medio sporae. 



Var. crataegi (Mass.) Vain. 



Arthopyrenia analepta var. crataegi Mass. Lich. It. Exs. VI (1856) 

 n. 186. A. analepta var. aucupariae Bagl. Erb. Critt. It. n. 241 (1241). 

 A. fallax b. aucupariae Jatta Fl. It. Crypt. Lich. (1911) p. 873. 



Exs. (partim sec. cit. ). Fr. Lich. Suec. Exs. IX (1826) p. 244. — 

 Nyl. Herb. Lich. Par. Ill (1856) n. 148. — Mass. 1. c. — Hepp Flecht. 

 Eur. (1857) n. 450, 451. - - Fellm. Lich. Arct. (1864) n. 221, 222. — Stenh. 

 Lich. Suec. Exs. n. 89. 



Apothecia dispersa, majora, lat. 0.360 — O.470 mm. Sporae 

 majores, long. O.016 — O.022, crass. O.006 — O.009 mm, saepe strato 

 gelatinoso indutae. 



Distr. Passim — sat frequenter in Fennia et Karelia 

 Vienaensi occurrit, locis numerosis etiam in Lapponia 

 collecta, praesertim ad corticem Sorbi et minus frequenter 

 ad Alnos, Tilias, Corylos, Populos, Betulas, Salices, Robinias 

 crescens. 



Perithecium ostiolo circ. O.045 mm lato. Nucleus jodo non 

 reagens, metaplasmate ascorum jodo rubescente. Paraphyses 

 crass. O.0015 — fere O.002 mm, ascos longitudine superantes, sim- 

 plices et apicem versus parcissime ramoso-connexae. Asci long. 

 O.075 — 0.080, crass, circ. O.013 — O.015 mm, raro clavato-cylindrici. 

 Sporae 8:nae, decolores, 1-septatae, fortuito raro parcissimeque 

 3-septatis immixtae, medio haud aut leviter constrictae, strato 

 gelatinoso saepe obvolutae. Conidia „acicularia utroque apice 

 acutiuscula, long. O.007 — O.010 mm, crass. O.0005 mm parum exce- 

 dentia" (Nyl. Lich. Paris p. 125). Gonidia vera desunt, algae 

 protococcaceae tantum fortuito in substrato hujus speciei prove- 

 nientes. — Est forma typica hujus speciei. 



