210 E. A. Vainio, Pyrenocarpeae. 



ad Didymellam fallacem (Nyl.) bene evolutam (b) et Didymosphaeriam 

 miculam (Flot.) male evolutam (sporam tantum unam nigricantem vidi), 

 perithecio O.220 mm lato instructam (c), et Didymellam fallacem male 

 evolutam una cum D. punctiformi (Pers.) crescentem (a). Oblivioni 

 igitur est tradendus. 



10. D. pyrenastrella (Nyl.) Vain. 



Verrucaria epidermidis var. pyrenastrella Nyl. Exp. Pyrenoc. (1858) 

 p. 59, Lich. Scand. (1861) p. 281. V. pyrenastrella Nyl. Fl. 1877 p. 231. 

 Arthopyrenia pyrenastrella Arn. Lich. Frank. Jur. (1885) p. 272, Lich. 

 Tirol XXV (1889) p. 261; A. Smith Mon. Brit. Lich. II (1911) p. 317. 

 Arthonia cembrina Anzi Lich. Rar. Langob. Exs. (1861) n. 207, Manip. 

 Lich. Langob. (1862) p. 30. Verrucaria submiserrima Nyl. Fl. 1877 p. 

 231. V. punctiformis f. alnicola Nyl. in Herb. Lich. Fenn. VIII (1882) 

 n. 391. 



Exs. Anzi Lich. Rar. Langob. Exs. (1861) n. 207 (herb. Nyl.), 

 (1866) n. 469, (1873) n. 557 (sec. Arn. Lich. Frank. Jur. p. 272). — Rabenh. 

 Lich. Eur. XXVII (1865) n. 726. — Norrl. et Nyl. Herb. Lich. Fenn. 

 VIII (1882) n. 391. — Arn. Lich. Exs. (1886) n. 1191. 



Thallus et hypothallus indistinctus. Apothecia plus 

 minus aggregata crebrave, verrucas formantia hemisphaericas, 

 nigricantes, nudas. Perithecium fusconigrum, dimidiatum, 

 lat. O.160 — O.200 mm, margine ostiolari baud prominente, ostiolo 

 circ. O.025 mm lato, zona nigricante, ex hyphis fuscis circa 

 perithecium excrescentibus formata, anguste cinctum. Asci 

 ventricosi, membrana vulgo modice incrassata. Paraphyses 

 sat obsoletae. Sporae polystichae, oblongae aut ovoideo- 

 oblongae, 1-septatae, long. O.01- — O.020 ( — O.025), crass. O.005 — 

 O.ooe mm (in Anzi Lich. Langob. n. 207), membrana sat tenui. 



Distr. Ad corticem Betulae et Populi (bals.) in Hel- 

 singforsia (Vain.). In cortice Alni ad Kolminainen in Ori- 

 mattila (K. Linkola), in Mustiala (A. Kullhem), Hollola et 

 Evo (J. P. Norrlin). Ad corticem Pyri communis in Kaila 

 in Asikkala (J. P. Norrlin). Ad Robiniam in Savonlinna 

 (O. Carlenius). Ad corticem Salicis pentandrae in Ryos- 

 karinkalla et ad corticem Sorbi et Pruni padi in Tiurusen- 

 krunni in par. Simo in Ostrobotnia bor. (V. Rasanen). Ad 

 corticem Betulae in Lapponia Fennica (Edvin Nylander) et ad 

 Sinum Kolaensem (N. I. Fellman). 



