Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 315 



21. Rh. subreductum Vain. 



Lecidea postuma *L. subreducta Vain. Adj. Lich. Lapp. II (1883) 

 p. 142. 



Thallus crustaceus, uniformis, areolatus, areolis minu- 

 tis, subplanis aut valde depresse subconvexis, laevigatis, 

 cervinis vel cinereo-subfuscescentibus, baud pruinosis, con- 

 tiguis, sat tenuibus aut fere modice incrassatis, nee KHO, 

 nee jodo reagentibus, hypothallo indistincto aut leviter 

 evoluto nigricanteque. Apothecia minuta, inter areolas 

 thalli sita et thallum subaequantia aut demum leviter vel 

 parum prominentia, plana aut demum levissime depresso- 

 convexa, vulgo subpapillata, papilla parum prominente, 

 nigra, nuda, tenuiter marginata aut mox immarginata. 

 Epithecium olivaceum aut olivaceo-fuligineum. Sporae 8mae, 

 decoloratae, persistenter 3-septatae, long. O.015 — O.025, crass. 

 0.007 — 0.009 mm. ' 



Distr. OKaj.: Cum Lecanora lacustri ad saxa gra- 

 nitica in rivulis prope Saukko et Templum in par. Kianta 

 (Vain.). 



Facie externa subsimile est Rh. reducto, areolis thalli minus 

 convexis, disco vulgo subpapillato, et sporis baud murali-divisis 

 ab eo differens. Thallus areolis difformibus, O.2 — O.4 ( — O.5) mm 

 latis. Apothecia crebra, lat. circ. O.5— O.7 mm, late adnata, basi 

 baud constricta. Perithecium fusco- aut subrubricoso-fuligineum 

 aut in margine superne olivaceo-nigricans. Hypothecium rubri- 

 coso- aut subfusco-fuligineum. Hymenium O.090 — O.oeo mm crassum, 

 gelatinosum, jodo caerulescens, ascis demum vinose rubentibus. 

 Paraphyses cellulis vulgo oblongis. Sporae distichae, decoloratae 

 aut raro demum dilute aeruginoso-fumosae, strato gelatinoso sat 

 crasso. Gonidia cystococcoidea, globosa aut subglobosa, diam. 

 0.007 — 0.016 mm, simplicia, membrana sat tenui, vacuolis late- 

 ralibus. 



22. Rh. submodestum Vain. 



Lecidea submodesta Vain. Adj. Lich. Lapp. II (1883) p. 137. 



Thallus verruculis minutissimis, parcissimis, hypothallo 

 indistincto. Apothecia sat parva, nigra, nuda, disco baud 

 papillato, laevigato aut leviter subscabrido, piano aut raro 

 depresso-convexo, margine tenui, persistente. Epithecium 



