

Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 55 



291 p. p. (sec. herb. Ach.). Lithoicea nigrescens Am. Lich. Frank. Jur. 

 (Fl. 1885) p. 243, Lich. Munch. (1891) p. 109. Verrucaria fuscoatra fl. ni- 

 grescens Wallr. Fl. Crypt. Germ. (1831) p. 307. Lichen fuscoater Web. 

 in Weis PL Crypt. Gotting. (1770) p. 39 (sec. Wallr. et Koerb.). Verru- 

 caria fuscoatra Koerb. Syst. Lich. Germ. (1855) p. 341 p. p. 



Exs. Moug. et Nestl. Stirp. Vog. XI (1840) n. 1065 p.p. — Hepp 

 Flecht. Eur. II (1857) n. 434 (in herb. meo). — Arn. Lich. Exs. (1886) 

 n. 1189 a, b. - - Malme Lich. Suec. Exs. XXV (1916) n. 625. 



Thallus modice incrassatus aut sat crassus, raro sat 

 evanescens, rimoso-areolatus, areolis 1.5 — 0.5 mm latis, 

 contiguis aut hypothallo confusis, difformibus, angulosis et 

 lateribus subundulatis, laevigatis, planis, fuscis aut nigre- 

 scentibus aut subcervinis, opacis, subtus nigricans vel hypo- 

 thallo nigro instructus. Apothecia dispersa aut sat crebra, 

 thallo immersa, demum verrucas formantia leviter promi- 

 nentes, late subconoideas, amphithecio thallino late obductas, 

 aut minutas et e vertice emergente denudatoque perithecii 

 constantes. Perithecium subhemisphaericum, 0.4— O.25 mm 

 latum, fuligineum, integrum, latere anguiato productove 

 et saepe hypothallo confuso, margine ostiolari prominente, 

 saepe irregulari, ostiolo sat parvo difformive. Sporae 

 oblongae ellipsoideaeve, long. O.on — O.027, crass. O.007 — O.on 

 mm. 



Distr. Regio Aboensis: In rupibus calcariis in Kauka- 

 salo et in Forby in par. Finby (Vain.). Savonia: In muris 

 castelli Savonlinna (Vain.). 



Sec. Chodat (Mat. Algu. Cult. p. 201, 217, 218) gonidia 

 pertinent ad Coccobotryem verrucariae. — In specimine Acha- 

 riano in Lich. Univ. p. 291 citato, in tegula proveniente, thallus 

 strato corticali haud evoluto, inferne nigricans, gonidiis in serie- 

 bus verticalibus crebre dispositis, coccobotryoideis, simplicibus 

 diam. O.010 — O.005 mm, partim 1-septatis, membranis sat tenui- 

 bus, perithecium lateribus productis, subrubricosofuligineum, KHO 

 violaceo-nigricans, plectenparenchymaticum. Periphyses vulgo 

 long. O.020 — O.012, crass. O.0015 mm, parce septatae. Sporae de- 

 colores, simplices, long. O.011, crass. O.007 mm. — Conidia „recta, 

 long. 0.0063, crass. O.0013 mm" (Linds. Mem. Sperm. Crust. Lich. 

 p. 298). 



F. rupicola Mass. {Lithoicea nigrescens v. rupicola Arn. Lich. 

 Frank. Jur., Fl. 1885, p. 245) est forma typica hujus speciei, 



