136 E. A. Vainio, Lecideales. 



B. Thallus ambitu lacinulato-effiguratus, lacinulis angustis, medio 



crustaceus. 



4. Th. cumulatutn (Sommerf.) Vain. Apothecia in acervulos 

 creberrime aggregata. 143. 



1. Th. caeruleonigricans (Lightf.) Poetsch. 



Thalloidima caeruleonigricans Poetsch Syst. Afz. p. 212 (sec. 

 Th. Fr. 1. c. p. 337); Arn. Lich. Frank. Jur. (Fl. 1884) p. 145. Lichen 

 Lightf. Fl. Scot. II (1777) p. 805. Lecidea Schaer. Lich. Helv. Spic. Ill 

 (1828) p. 120. Toninia Th. Fr. Lich. Scand. II (1874) p. 336 p. p. 

 Patellaria vesicularis Hoffm. PI. Lich. II (1794) p. 30, tab. XXXII f. 3. 

 Lecidea Ach. Meth. Lich. (1803) p. 78; Nyl. Lich. Scand. (1861) p. 214. 

 Thalloidima Koerb. Syst. Lich. Germ. (1855) p. 179; Th. Fr. Lich. Arct. 

 (1860) p. 174. 



Exs. Fr. Lich. Suec. Exs. XI n. 313. — Stenh. Lich. Suec. Exs. 

 n. 17. — Havaas Lich. Exs. Norv. (1908) n. 382. 



Thallus verrucoso- aut demum subfruticuloso-squamosus, 

 squamis majore parte erectis, simplicibus aut demum sub- 

 lobato-ramosis, difformibus, apicibus saltem majore parte 

 convexis inflatisque et demum fistulosis, demum stipitatus 

 et in hypothallum radiciformem continuatus, superne pallido- 

 olivaceus aut cinereo-glaucescens, vulgo laevigatus, nudus 

 aut plus minus pruinosus, Apothecia basi bene constricta, 

 demum lata, plana aut rarius demum depresso-convexa, 

 nigra, nuda aut partim caesio-pruinosa. Hypothecium su- 

 perne late intense fuscescens aut (in var. atypicis) rubrico- 

 sum. Sporae subfusiformes, 1-septatae. 



Distr. Ad terram nudam et inter muscos supra rupes 

 et in fissuris rupium locis calcariis rara in Fennia. Ab.: 

 Insula Jurmo in par. Korpo (E. Nylander, „f. glebosa Ach." 

 sec. W. Nyl.). KOn.: Tiudie (A. Kullhem), Valkeamaki (A. 

 Kullhem, J. P. Norrlin, „L. vesicularis" sec. Nyl. in Norrl. 

 Fl. Kar. Oneg. II p. 22). 



Squamae confertae, crustam crassam plus minus latam 

 constituentes, superne laeves (aut raro strato corticali rimuloso- 

 dehiscente, f. dehiscens Vain., ad Hardang-er in Norvegia 

 ab Havaas collecta), saepe verrucas difformes, circ. 2.5 — 

 0.5 mm latas formantes. Apothecia lat. 1 — 5 mm, margine 

 primum prominente, modice incrassato, demum baud raro ex- 



