Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 203 



Exs. Leight. Lich. Brit. Exs. V (1854) n. 150. — Hepp Flecht. 

 Eur. Ill (1860) n. 516. - Mudd Lich. Brit. Exs. II (1861) n. 150. — Anzi 

 Lich. Langob. Exs. VII (1861) n. 282. — Arn. Lich. Exs. (1874) n. 462 b. 

 — Malme Lich. Suec. Exs. VII (1910) n. 167. 



Apothecia pruinosa. 



Distr. Ad corticem Salicis capreae, Sorbi, Betulae, Tiliae, Quer- 

 cus, Pini collecta. Ab.: Osterniis in Pargas (K. Linkola). N.: Mjolo 

 (W. Nyl.), Stansvik in Degero prope Helslngforsiam (K. Linkola). 

 Ta.: Manskivi alioque loco in Asikkala, Evo in Lammi (J. P. Norrlin). 

 Kuus.: Ruskeakallio (F. Silen, „L. caerulea'' secund. determ. Nylandri). 

 KKer.: liava (N. I. Fellman, „f. sabpallens" in herb. Nyl., n. 17167, „f. 

 decolorascens" Nyl. in mus. Fenn.). 



Apothecia lat. O.2— O.g mm (— 1.2 mm in Mudd 1. c. n. 150), disco 

 piano aut vulgo mox convexo, livido aut livido-nigricante aut rarius 

 livido-pallescente, tenuiter caesio-pruinoso, margine nigricante aut livido 

 pallescenteve, nudo aut tenuiter pruinoso, mox vel demum excluso. 

 Hypothecium superne dilute stramineum. Hymenium circ. O.oso mm 

 crassum, parte superiore dilute sordide subviolascens aut raro sub- 

 olivaceum in eodem apothecio, KHO pulchre violascens. Sporae ba- 

 cillares aut rarius subaciculares, apicibus obtusis aut acutis, rectae, 

 long. circ. O.023— O.026 (ex Hepp et Nyl. O.020 0.0^2), crass. O.0015 — O.oos mm, 

 1 — 3-septatae (— 7-septatae: Hepp 1. c). 



Obs. 1. F. fomentaria (Nyl.) Vain. (L. stenospora \a.r. fomentaria 

 Nyl. in Norrl. Bidr. Sydostr. Tav. Fl., 1870, p. 189), ad Polyporum fo- 

 mentarium in Asikkala Tavastiae austr. a Norrl. lecta, ad statum inter- 

 medium inter v. obscuriorem et v. Beckhausii pertinet. Apothecia O.15— O.2 

 mm lata, disco piano, nigricante subnudoque aut tenuissime pruinoso 

 sublividoque, margine tenuissimo, nigricante, nudo. Hymenium O.040 mm 

 crassum, parte superiore sat dilute sordide subviolascens, KHO viola- 

 scens. Hypothecium pallidum. Perithecium in margine sordide sub- 

 violascens, KHO violascens. Paraphyses arete cohaerentes. Thallus 

 tenuis, albidus, laevigatus, crebre areolato-diffractus, initiis apothecio- 

 rum et pycnidiis nigris crebre instructus. Conceptaculum in lamina 

 tenui sordide violascens. Basidia brevissima. Stylosporae numero- 

 sissimae, ellipsoideae, lateribus rotundatis, apicibus rotundatis, long. 

 0.002 — 0.0025, lat. 0.001.T mm. 



Obs. 2. Dacidia Beckhausii ( Koerb. 1. c.) est nomen antiquissimum 

 hujus varietatis et „disco hyalino-livido nigrescenteve, caesiopruinoso" 

 rite descripta est, at saltem apothecia hyalino-livida epithecium „von 

 schwach lauchgriiner Farbung" habere non possunt, ut Koerb. erronee 

 affert. Epithecium in hac varietate dilute sordideque obscuratum est 

 et color ejus difficile determinatur. In Biatora stenospora Hepp 

 (Flecht. Eur. n. 519 in herb, meo) apothecia sunt pruinosa, epithecio 



