40 E. A. Vainio, Pyrenocarpeae. 



Distr. Ad saxa granitica, gneissacea, schistosa et are- 

 naria in rivulis, pratis et silvis obvenit. — Alandia (Edvin 

 Nylander, „V. nigrescens var. fnsca" sec. determ. W. Nyl. in 

 Mus. Fenn.). Regio Aboensis: Ad Aboam (P. A. Karsten, 

 „V. margacea v. aethiobola" sec. Nyl. in Mus. Fenn.). Ta- 

 vastia austr. : Hersala et Siikaniemi in Hollola (Vain.), in 

 Hollola etiam a Norrl. lecta („V. nigrescens" sec. Nyh in 

 Mus. Fenn.), Tammijoki in Luhanka („V. umbrinula" sec. 

 determ. Nyl. in Vain. Fl. Tav. Or. p. 120), Sutoisenniemi in 

 Korpilahti (cum V. acrotella f. subathallina). Ostrobotnia 

 Kajanensis: Pietari („V. umbrinula" Vain. Adj. Lich. Lapp. II 

 p. 172) et Kiannanniemi in par. Kianta („*K. obnigrescens" 

 Vain. 1. c. p. 173). 



Ob thallum alium a V. obnigrescente, quacum commixta r 

 distinguenda est, et saepe in V. umbrinulam transit. Sporae 



long. O.oh — O.021, crass. O.oos — O.009 mm. Perithecium globosum, 

 fuligineum, integrum. Thallus obscure coloratus, nigricans aut 

 subumbrinus aut glaucescenti-nigricans. 



Obs. Verrucaria umbrinula f. subvirens Vain., Adj. Lich. Lapp. II 

 p. 172, ad saxa in rivulo in regione pinifera ad Veskoniemi in Lapponia 

 Inarensi lecta, var. degredienti proxima, thallo modice inrassato aut sat 

 'tenui, verruculoso-inaequali, haud granuloso, glaucescenti-, olivaceo- et 

 fuscescenti-variegato, sporis long. O.oh— 0. on, crass. O.006 — O.oos mm in- 

 structa est. Specimen ad Pietari in Kianta lcctum ad V. aethiobolam 

 Ach. pertineat. 



5. V. acrotella Ach. 



Meth. Lich. (1803) p. 123; Nyl. Lich. Scand. (1861) p. 293; Hue 

 Addend. II (1888) p. 281. Verrucaria striatula J. V. acrotella Ach. Lich. 

 Univ. (1810) p. 293 (excl. specim. e Lusatia), Syn. Lich. (1814) p. 95 

 p. p. V. umbrinula f. acrotella Vain. Adj. Lich. Lapp. II (1883) p. 173. 

 V. aethiobola var. acrotella A. Smith Mon. Brit. Lich. (1911) p. 282. 

 V. margacea var. mauroides Nyl. Ad Veg. Hels. Add. (1859) p. 235, 

 Lich. Lapp. Or. ( 1866) p. 169. 



Thallus tenuissimus, dispersus aut partim subcontiuuus, 

 nigricans, aut vulgo evanescens, hypothallo inconspicuo aut 

 distincto nigricanteque. Apothecia crebra, verrucas forman- 

 tia O.15—O.1 mm latas, hemisphaericas aut conoideo-hemi- 

 sphaericas, nigras, nudas. Perithecium substrato adnatum, 

 fuligineum, integrum, latere haud producto, margine ostio- 



