Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 243 



Distr. Ad corticem Populi et Sorbi, rarius Salicis 

 capreae, Alni, Coryli, Pini, Syringae locis apricis vel sub- 

 apricis sat frequenter aut passim in provinciis australibus 

 et mediis, septentrionem versus rarescens. Tb.: Lohikoski 

 in Jyvaskyla (Vain. Fl. Tav. Or. p. 113). Ta.: Paivakunta 

 in Korpilahti, Kesain in Luhanka (Vain. 1. c), Evo, Asikkala, 

 pluribus locis in Hollola (Vain.), Tammela et Loimijoki 

 (A. Kullhem). Locis numerosis in Nylandia, nonnullis locis 

 ad Viburgum (Vain. Lich. Vib. p. 63), ad Perttiniemi in KOn. 

 (Norrl. Symb. Fl. Kar. II p. 31). 



Thallus tenuis aut sat tenuis, dispersus aut subcontinuus, 

 interdum parum inaequalis, albidus aut cinereo-albicans, nee 

 KHO nee CaClsOa reagens, hypothallo indistincto aut (in f. hypo- 

 mela) caeruleo-nigricante. Apothecia lat. 0.3 — 0.4 (O.25 — O.s) mm, 

 saepe crebra, interdum tuberculata. Hymenium crass. O.050 — O.oeo 

 mm, jodo „caerulescens, dein obscuratum" (sec. annot. Nyl.) vel 

 „plus minus sordide fulvescens rubescensve" (sec. Th. Fr.), 

 persistenter caerulescens solutione mea. Pars superior hymenii 

 striatim fuscescens aut violaceo-fuscescens, „KHO insigniore modo 

 non mutata" (Th. Fr.), HNO3 violascens (sec. Nyl. in Norrl. 1. c). 

 Paraphyses arete cohaerentes, baud gelatinosae, crass. O.0015 mm 

 aut tenuiores (apice O.003 mm), increbre septatae. Hypothecium 

 parte superiore angusta subplectenparenchymaticum, vix pachyder- 

 maticum, cellulis parvis, anguloso-rotundatis, irregulariter disposi- 

 tis, parte inferiore chondroideum, pachydermaticum, irregulariter 

 contextum, tubulis angustis. Conidia „arcuata, long. O.oii — O.015, 

 crass. 0.0005 mm" sec. Nyl. Lich. Paris p. 82, „recta vel rectiu- 

 scula, elongato- vel cylindrico-oblonga, long, O.ooe — O.oio, crass. 

 0.0015 — 0.002 mm" sec. Th. Fr. 1. c. (Stizenb. 1. c. p. 22), forsan 

 ambarum formarum. Gonidia cystococcoidea, globosa, diam. 

 0.008 — 0.012 ( — O.oie) mm, simplicia, vacuolis lateralibus, chro- 

 matophoro centrali, anguloso, membrana sat tenui, interdum 

 autosporas continentia numerosas, globosas, diam. O.oos — O.ooe 

 mm. 



F. vacillans Vain. (Norrl. et Nyl. Herb. Lich. Fenn. cent, 

 192L n. 720, Lecidea sphaeroides f. vacillans Nyl. Lich. Scand., 1861, 

 p. 204, Prodr. Nov.-Granat. Lich. ed. 2, 1864, p. 58), apotheciis circ. O.2 

 mm latis differens, ad corticem Syringae vulgaris in Uusikartano 

 in Hollola (Norrl.). In Hampe Exs. n. 39, a Nyl. citato, apothecia 

 pallidiora (rufescentia) et diu plana marginataque, sporae 3-septatae. 

 Specim. ad Salam in Suecia collecta, apotheciis O.5 — O.3 mm latis, 

 rufescentibus instructa, item a Nyl. citata sunt. 



