260 E. A. Vainio, Lecideales. 



19. B. albidolivens (Nyl.) Blomb. et Forssell 



Enum. Plant. Scand. (1880) p. 82. Lecidea albidolivens Nyl. Fl. 

 1874 p. 10; Hue Addend. II (1888) p. 159. 



Thallus tenuissimus, macula albida vel cinerascente 

 indicatus, laevigatus aut verruculis cinereo-glaucescentibus, 

 valde depressis, gonidia continentibus inspersus, esorediatus. 

 Apothecia minutissima, albido-pallida aut livido-cinerea aut 

 livido-nigricantia nigrave in eodem specimine, late adnata, 

 primum depresse deindeque bene convexa, nuda, immargi- 

 nata. Hypothecium decoloratum aut pallidum. Hymenium 

 totum decoloratum aut (in apotheciis obscurioribus) partim 

 sordide caeruleo-fuscescens vel sordide violascens aut epi- 

 thecio violascente. Perithecium albidum aut in apotheciis 

 obscuratis intus caeruleo-fuscescens et extus pallidum. 

 Sporae polystichae, oblongae aut fusiformi-oblongae, apici- 

 bus obtusis, 3-septatae, long. „0.oi6 — O.024 mm" (sec. Nyl.), 

 crass. 0.004—0.0045 mm. 



Distr. Ad truncum putridum in littore stagni prope 

 Nyystola in Padasjoki in Ta. (Vain.). 



Apothecia lat. O.2 ( — O.3) mm, crebra, parum nitidula. Hypo- 

 thecium hyphis verticalibus, membranis leviter incrassatis, cavi- 

 tatibus 0.0015 — O.003 mm latis, ellipsoideis oblongisve et partim 

 rotundatis, in parte inferiore hyphis irregulariter contextis. Peri- 

 thecium hyphis radiantibus, pachydermaticis, cavitatibus tenuibus, 

 elongatis. Hymenium circ. O.oso mm crassum, KHO dilutius 

 coloratum, jodo persistenter caerulescens (sicut etiam hypotheci- 

 um), sec. Nyl. demum fulvo-lutescens. Paraphyses arete cohae- 

 rentes, tubulis O.ooi — O.0015 mm crassis, ramosis et parce ramoso- 

 connexis, gelatinam in KHO turgescentem percurrentibus. Asci 

 late clavati, long. O.035 — O.040, crass. O.014 — O.022 mm. Sporae in 

 seriebus 4 — 5 dispositae, rectae aut sec. Nyl. leviter curvatae. 

 Gonidia globosa, simplicia diam. O.oo? — O.004 mm, parce 2-cellulosa 

 visa, demum glomerulosa, membrana sat tenui, forsan pleuro- 

 coccoidea. 



Obs. Habitu subsimilis est B. peliocarpae Anzi (Neosymb. Lich., 

 1866, p. 10), quae autem sec. specim. orig. in herb. Nyl. thallo minu- 

 tissime verruculoso, verruculis dispersis, elevatis, fere granuliformibus, 

 et sec. descr. hymenio „superne subsmaragdulo" ab B. albidolivente 

 differt. Ambae affines sunt speciei B. trisepta dictae. L. violacea 



