22 MALME, FLECHTEN DER ERSTEN REGNELL'SCHEN EXPEDITION. II. 



superioribiis nonniliil pachydermaticis; gonidia globosa, 6 — 10 

 u crassee; stratuni meduUare bene evolutuin, ex hypbis for- 

 matum in laciniis p. p. maxima longitudinalibus, leptoder- 

 maticis, sat arcte conglutinatis, J non reagentibus. Pars 

 inar^inalis excipiili pro rata crassa, gonidia numerosa fovens; 

 strato corticali sat crasso, superne band attenuato, J non 

 reagente; margine proprio subnullo. Thechim circiter 40 ,« 

 altuni, J persistenter coerulescens; paraphyses sat graciles, 

 circiter 1,5 i-i crassée, sat arcte cohserentes, simplices, apice 

 capitato-clavata3, clava brevi, l) — 3,^> u crassa, superne fusca. 

 Sporae utroque apice rotundat^e, mox fascescentes, septo di- 

 stinctissimo. 



Habitat ad lapides saxaque quartzosa y^ (quartzoso-)schi- 

 stosa, in apricis vulgo ventosis. 



Specimina reportavimas e Rio Grande do Sal: Porto Alegre 

 (18 Ve 93. N:o 1337.); Måtto Grosso: Santo Antonio, Morro 

 Grande (18 20/12 93. N:o 2131.) et Morrinho (18 -'■, 4 94. N:o 2617.). 



Boreali-amcricana B. thysanota Tucic. [Obs. IV (1877), p. 174.] a uostra 

 specie recedit crusta minus distincte radiato-efflgurata, apotlieciis magis elevatis, 

 crasse marginatis, sporis crassioribus, episporio magis incrassato. 



Comparanda est nostra species etiam cum R. dijfractella Mull. Arg. 

 [Lecan. et Lecid. austral. (lH9ö), p. 634.], quse ad specimen adeo incompletum 

 descripta est, ut non pateat, ntrum margine lobato-radiata sit necne; quoad 

 sporas sat congruunt, at apothecia in specie a celeberr. Möller descripta 

 paullulo sunt majora. 



2. R. pliysciteformis Malme n. sp. 



Tliallus suborbicularis, substrato arcte adnatus, centro cru- 

 staceus, rimoso-areolatus, areolis minutissimis, verruculosis, 

 marginem versus lobato-radiatus, radiis subcontiguis, augustis, 

 apicem versus dilatatis, ipso apice stepe crenulatis, subplanis, 

 albidus v. glaucescenti-cinereus. Apothecia sat conferta, ad- 

 nata v. adpressa, parva, 0,2 — 0,:iö mm. lata; disco atro v. ni- 

 gricante, opaco, persistenter piano v. demum convexiusculo; 

 margine tenui, subintegerrimo, thallo concolore v. nonnumquam 

 demum obscurascente, persistente. Hypotheeium pallidum; 

 thecium superne fuscidulum, KOH immutatum. Sporae in ascis 

 inflato-clavatis Smse, ovoidese v. ovales, medio baud raro non- 

 nihil constrictse, (7 — )8 — 9,5(— 11) ,« longte, 5 — 6 u crassa?, 

 episporio tenui. 



