Dr. Nylander on Lichens in the Luxembourg Gardens. 247 



13. Lecanora vitellina, var. epixantha (Ach. L. U. 208, sub 

 Lecidea), Nyl. L. Scand. 141. Ssepius fertilis. K — . 



14. Lecanora cerina (Ehrh.), Ach. Forma thallo cinereo 

 turgescente rugoso ; fertilis. 



15. Lecanora pyraceayi. pyrithroma^ A.Qh.^l^j\. Scand. 145. 

 Forma rupestris (Scop.), Nyl. I. c. Sporis 1-sept. varian- 



tibus septo crassiore. 



16. Lecanora sophodesj var. teichophila, Nyl. Fertilis. 

 Var. exiyuaj Ach. Nyl. Scand. 152. 



17. Lecanora circinata (Pers.), Ach., Nyl. Scand. 152. Fer- 

 tilis. 



18. Lecanora galactina^ Ach.,Nyl.Z.c. 134 (sub Squamaria). 

 K — . Gel. hym. iodo casrulescens, deinde ssepe vix nisi thecge 

 sic tinctas. 



Note. — Lecanora dispersa (Pers.) =Z. galactina ecrustacea. 

 Apothecia L. disperses livido-pallescentia vel subcornea aut 

 nigrescentia pruinosa, margine albo crenulato vel obsolete 

 crenulato (saepe subintegro vel farina epithallina alba crenu- 

 lato), trita obvenientia margine proprio subconcolori demum 

 explanato ; sporae 8, ellipsoideaa simplices ; paraphyses graci- 

 lentae (saepius apice incrassatae ibique granulationibus in- 

 spersae). K— . 



19. Lecanora urhana^ ^jl* Thallus albus opacus granu- 

 lato-squamulosus, granulis depressis crenatis, mediocris ; apo- 

 thecia pallido-subincoloria leviter albo sufFiisa conferta medio- 

 cria, margine thallino subcrenulato cincta, saepe subangulosa ; 

 sporae 8, ellipsoideae ; paraphyses crassiusculae, articulatae, apice 

 incolori, non clavatae. Gel. hym. iodo caerulescens, dein vix 

 nisi thecae (sordide violaceo vel caerulescenti) tinctse. Ad 

 lapides, Rue de I'Ouest. 



Note. — A L. galactina praesertim diifert thallo firmiore pu- 

 rius albo et paraphysibus duplo vel triplo crassioribus distincte- 

 que articulatis. 



Comparanda est cum L. galactina nova species in regione 

 Parisiensi vigens Lecanora teichotea cui thallus albidus sub- 

 radiato-rimosus, ambitu placodioideo effiguratus ; apothecia 

 fusco-rufa convexiuscula, margine thallino crenulato cincta; 

 sporae 8, ellipsoideae ; paraphyses capitulo lutescente ; spermo- 

 gonia incoloria (extus solum puncto obscuro indicata), sper- 

 matiis arcuatis. Pertinet vero haec ad aliam stirpem Lecano- 

 rarum ; thallus C + erythrinicam dilutam. Affines L. teichotece 

 sunt L. pruinifera^ Nyl. [L. pruinosa^ Chaub. in St. Am. Fl. 

 Ag. 497, nomen non retinendum ob idem alii datum) et L. 

 Reuteriiy Schaer., quarum thalli C+ erythrinice. 



20. Lecanora dissipata^ Nyl. Thallus pr^cipue hypothallo 

 nigricante subleproso indeterminato constans ; apothecia sub- 



