392 A. Zahlbrucknor, 



atre trcs-niarquec et alors cxhalant unc düiice od cur des 

 violettes^<. Diesen Veilchengeruch zeigen bekanntlich alle 

 Sclerolichenen Th. Fries in angefeuchtetem Zustande; er 

 ist direct auf die Chroolepusgonidien zurückzuführen. 



Thelotremaceae. 



Gyrostomum scyphuliferum E.Fries, Syst. Orb. Vegetab. 

 (1825), p. 268; Wainio, Etud. Lieh. Bresil, vol. II (1890), p. 86. 

 Syn.: Lecidea scyphtilifera Ach., Synops. (1814), p. 27. 



Corticola in horto botanico Janeirensi (Höhnel, Nr. 66). 



Leptotrema microsporum A. Zahlbr. nov. sp. 



Thallus epiphloeodes, crassiusculus, 0*25 — O'Sinm altus, 

 cinerascenti- vel glaucescenti-flavidus, nitidulus, effusus, con- 

 tinuus, parum inaequalis vel subrugulosus, KHO aurantiacus, 

 CaClgO^ — , in margine linea tenui nigra cinctus; cortice 

 angusto (19 — 26 [x crasso), hyalino, subamorpho, ex hyphis 

 subhorizontalibus dense contextis formato; hyphis medullae 

 tenuibus, I vinose rubentibus; gonidiis chroolepoideis, cellulis 

 concatenatis, subglobosis, 5 — 1 1 [x longis, glomerulos irreguläres 

 formantibus, membrana tenui. 



Apothecia copiosa, immersa, mono- vel bicarpica; excipulo 

 verruculam parvam modice convexam, 0*4— 0*8 mm latam 

 formante, primum anguste, demum latius (O'S — 0*5 mm) 

 aperto; disco rotundato, piano, albo-pruinoso; perithecio nigri- 

 cante in lateribus mediocri vel crassiusculo, in parte basi 

 angustiore vel totum deficiente; hymenio pallido, 90 — llOfx 

 alto, I lutescente; epithecio pulverulento et pallido; hypothecio 

 angusto, hyalino; paraphysibus tenuibus, circa 1 [x crassis, 

 arcte cohaerentibus, simplicibus et eseptatis, strictiusculis, apice 

 haud latioribus; ascis oblongo-subcylindricis, apice rotundato- 

 obtusis, 78 — 82 |x longis et 12-^14 (x latis, 8-sporis; sporis in 

 ascis uniserialibus, murali-divisis, fumoso fuscis, late ovalibus 

 vel late ellipsoideis, obtusis, 11 — 13<x longis et 6 — 7 ;x latis, 

 cellulis rotundcitis in seriebus transversalibus -1, loculis in 

 Seriebus apicalibus soUtariis, in seriebus mediis binis. 



