Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 139 



Obs. 2. Plantae, sub nomine T. candidae in Malme Lich. Suec 

 Exs. n. 411 et Havaas Lich. Exs. Norv. n. 286 distributae, pertinent ad 

 Th. subrimulosum Nyl. (Fl. 1875 p. 445), quod proxime affine est Th. 

 Nordlandico (Th. Fr. Lich. Scand. II p. 339). 



Obs. 3. Var. hypomelaena Vain., supra ipsam rupem ad Engel- 

 berg in Helvetia a me abundanter coUecta, thallo instructa est superne 

 crebre pruinoso, inferne nigro, repente, applanato, rhizinis 3 — 4 mm 

 longis, radiciformibus, constipatis, nigris, hypothecio superne O.040 mm 

 late roseo, parte inferiore O.ioo — O.120 mm lata albida. 



Th. squalescens (Nyl.) Vain. 



Lecidea squalescens Nyl. Nov. Lich. Norv. (Vet. Ak. Forh. 1860) 

 p. 297, Lich. Scand. (1861) p. 220, Enum. Lich. Fret. Behr. (1888) p. 23. 

 Toninia Th. Fr. Lich. Scand. II (1874) p. 340. Thalloidima rimulosum 

 Th. Fr. Lich. Arct. (1860) p. 174. „Lecidea Dufourii Ach." in herb. Nyl., 

 Fl. 1867 p. 373 p. p. (excl. specim. Achariano). 



Thallus e verrucis constans saepe demum clavatis et proliferis 

 ramosisve aut subtuberculosis, solidis aut demum fistulosis, vertice 

 convexis, circ. O.5 — O.2 (O.7— O.i) mm latis, saepe demum substipitatis et 

 in hypothallum radiciformem plus minus distinctum continuatis, cine- 

 rascentibus, baud pruinosis. Apothecia adnata, baud constricta, con- 

 vexa, immarginata, nigra, nuda. Hypothecium impure pallidum. Sporae 

 ellipsoideae, 1-septatae. 



Distr. Supra muscos et detritum rupium in regionibus alpinis 

 Scandinaviae proveniens, etiam in Lapponiam distributum esse indica- 

 tur, sed specimina hue relata, a me denuo examinata, revera ad alias 

 species pertinent (conf. p. 140). 



Facie externa saepe vix differt a Bilimbia ligniaria et B. trisepta, 

 sed specimen orig. distincte ad Thalloedaema pertinet, indole thalli 

 hypothallique ad parvum Th. caeruleonigricans accedens. — Verrucae 

 thalli confertae, crustam saepe crassam, interdum sat tenuem forman- 

 tes. Apothecia dispersa aut leviter conferta, opaca. Perithecium ex 

 hyphis formatum radiantibus, sat pachydermaticis, conglutinatis, tubu- 

 lis tenuibus, chondroideum, dilute sordide aeruginosum aut partim 

 subdecoloratum. Hypothecium sordide pallidum, KHO pauUo magis 

 obscuratum, in parte superiore hyphis sat erectis, ceterum irregulari- 

 ter contextis, conglutinatis, chondroideum. Epithecium olivaceo- aut 

 partim subaeruginoso-nigricans (KHO non reagens in specim. orig. n. 

 18840, quod hie descriptum est). Hymenium jodo caerulescens, dein 

 subviolaceo-decoloratum (Th. Fr.). Paraphyses arete cohaerentes, crass. 

 0.001 mm, apice O.0015 mm, parum ramoso-connexae, KHO parum tur- 

 gescentes. Asci clavati. Sporae distichae, apicibus rotundatis, „long. 

 0.007—0.010, crass. O.ooi — O.006 mm" (sec. Nyl.). 



