Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 313 



Distr. Supra lapidem ad Tervaniemi Viburgi {„L. distincta" in 

 Vain. Lich. Vib. p. 68). 



19. Rh. reductum Th. Fr. 



Lich. Scand. II (1874) p. 633. Lecidea lavata *L. reducta Nyl. 

 in Elfv. Ant. Veg. Svir (Meddel. Soc. F. Fl. Fenn. II, 1878) p. 169. 

 L. reducta Nyl. in Lamy Cat. Lich. Mont-Dore (1880) p. 131 (excl. 

 specim. Gall.). 



Exs. Arn. Lich. Exs. (1897) n. 1738 („planta Danica"). 



Thallus crustaceus, uniformis, verrucosus, verrucis 

 minutis, convexis, laevigatis, cinereis aut cervinis vel 

 cinereo-fuscescentibus, haud pruinosis, contiguis, nee KHO, 

 nee (sec. Th. Fr.) jodo reagentibus, hypothallo nigro. 

 Apothecia minuta, nigra, nuda, inter verrucas thalli sita 

 et vulgo thallum subaequantia, plana aut raro demum con- 

 vexa, haud papillata, tenuiter marginata aut mox immar- 

 ginata. Epithecium aeruginoso-fuligineum aut „olivaceo- 

 fuscescens" (sec. Th. Fr.). Sporae 8:nae, decoloratae, sub- 

 murali-divisae, long. circ. ,,0.022— O.ose, crass. O.oio — O.oie mm" 

 (sec. annot. Nyl.). 



Distr. Supra rupes graniticas et gneissaceas ad Vaa- 

 nia in Hollola in Ta. (leg. Vain., determ. Nyl.) et ad Vos- 

 nessenje in KOI. (F. Elfving, det. Nyl.). 



Proximum est Rh. hyalescenti, quod thallo jodo subviola- 

 scente, areolis planis aut minus convexis et epithecio rubricoso- 

 fuscescente ab eo differt. Specimina Tirolica et Gallica, hue a 

 Nyl. ducta, areolis thalli planis a speciminibus Fennicis differunt. 



— Thallus verrucis O.5 — O.2 mm latis, modice incrassatis. Apo- 

 thecia crebra, lat. circ. O.4 — O.7 mm, late adnata, basi haud con- 

 stricta, disco laevigato. Perithecium subfusco-fuligineum. Hypo- 

 thecium rubricoso-fuligineum. Epithecium in specim. Fennicis 

 aeruginoso-fuligineum. Hymenium circ. O.iio mm crassum, gela- 

 tinosum. Sporae septis transversis 3 — 4, vulgo tantum uno lo- 

 culo septo uno longitudinali obliquove diviso, tantummodo mor- 

 bosae aeruginosae. Gonidia cystococcoidea, globosa aut sub- 

 globosa, diam. O.oio — O.006 mm, simplicia, membrana sat tenui. 



— L. postumans Nyl. in Sandst. 3 Nachtr. p. 490 (Zwackh Lich. 

 Exs. n. 1189) facie externa huic subsimilis est. 



