18 E. A. Vainio, Pyrenocarpeae. 



saepe subrenulato-lobulatus. Stratum corticale inferius O.040 mm. eras- 

 sum, cavitatibus cellularum O.ooe— O.004 mm latis, membranis leviter pa- 

 chydermaticis. Apothecia crebra, immersa, margine ostiolari obscurato, 

 interdum demum verruculam formante. Nucleus jodo caerulescens. 

 Paraphyses in gelatinam diffluxae, striis indicatae. Periphyses nume- 

 rosae, crass. O.004 mm, vix aut paullo longiores. Asci oblongi aut sub- 

 ventricosi aut cylindrici, long. O.040— O.oso, crass. O.010 — O.012 mm, mem- 

 brana gelatinosa. Sporae 8:nae, distichae aut monostichae, globosae 

 aut subglobosae, diam. O.oob — O.007 mm, aut long. O.007 et crass. O.005, 1. O.oos 

 aut O.009 et cr. O.007 mm, simplices, decolores. Tales sunt 7 thalli in spe- 

 cimine sinistro in Suecia collecto. Ad eos etiam descriptiones primae 

 („nigrofuscus") et tab. 3 f. 3 1. c. spectant. E specimine dextro, item 

 in Suecia collecto, ad D. meiophyllum Vain, pertinente, restant 2 thalli, 

 superne cinereo-pallescentes, subtus obscuratae, sporis ellipsoideis. 

 Hue descriptio in Syn. Lich. p. 102 p. p. spectat („subcinerascenteque"). 

 Specimen ex Hispania (quod non est originale) ad Heppiam Guepini 

 (= H. euplocam Ach.) pertinet. 



Sect. 2. Placidium (Mass.) Vain. 



Lich. Caucas. (1899) p. 336. Placidium Mass. Symm. (1855) p. 75, 

 Miscell. (1856) p. 31; Arn. Lich. Munch. (1891) p. 108. Endopyrenium 

 Koerb. Syst. Lich. Germ. (1855) p. 323 (haud Flot.); Zahlbr. Ascol. 

 (1903) p. 60. Catopyrenium Flot. in Koerb. Grundr. Crypt. (1848) p. 199 

 (sec. spec, cit, at excl. descr.). 



Thallus squamosus aut subfoliaceus, tantum superne 

 aut etiam inferne strato corticali obductus, hypothallo sub- 

 strate- affixus. Perithecium decoloratum pallidumve, vertice 

 obscurato. — Ab hac sectione sect. Rhizoderma Vain, thallo 

 rhizina radiciformi affixo distinguitur [Derm, radicescens (Nyl.) 

 Vain.]. 



7. D. Iachneum (Ach.) A. Smith 



Mon. Brit. Lich. II (1911) p. 720. Lichen lachneus Ach. Lich. Suec. 

 Prodr. (1798) p. 140. Endocarpon Iachneum Ach. Meth. Lich. (1803) p. 

 127, Lich. Univ. (1810) p. 299, Leight. Brit. Angioc. Lich. (1851) p. 14 

 p. p., tab. Ill fig. 2? (potius sit D. hepaticum). E. Hedwigii ,■>'. E. 

 Iachneum Ach. Syn. Lich. (1814) p. 99. E. rufescens Ach. Lich. Univ. 

 (1810) p. 304, Syn. Lich. (1814) p. 100; Nyl. Prodr. Lich. Gall. (1857) 

 p. 175 (421), Exp. Pyrenoc. (1858) p. 14, Lich. Scand. (1861) p. 265, Lich. 

 Lapp. Or. (1866) p. 188, Lich. Par. (1896) p. 116; Schwend. Unters. 

 Flecht. II (1863) p. 188; Norrl. Ber. Torn. Lappm. (1873) p. 343, 347, 

 Fl. Kar. Oneg. II (1876) p. 38; Vain. Adj. Lich. Lapp. II (1883) p. 164; 



