42 MALME, FLECHTEN DER ERSTEN REGNELL'sCHEN EXPEDITION. II. 



Var. 3. Thallus quam in forma primaria paullo crassior, 

 magis diffractns; apothecia fere innata, margine tenuissimo v. 

 subnullo, disco ssepe convexiiisculo. 



Pars marginalis excipuli inferne seepe gonidia numerosa 

 f o vens. 



Habitat ad saxa arenaria subhumida. 



Paras-uay: Asuncion, meridiem versus (18 ^"^ 8 93. N:o 1597.). 

 Etsi habitu perinsignis, quoad thecium si^orasque non recedit 



R. sp. {R. conspers(E Mull. Arg. affinis). 



Thallus crustaceus, eiFusus, tenuissimus, rimoso-areolatus 

 v. disperse areolatus, areolis minutis planis, Isevigatus, albido- 

 glaucescens, hypotballo atro. Apothecia sat sparsa, adpressa, 

 parva, 0,2 — 0,4 mm. lata; disco nigro, primnm diuque concavo, 

 dein persistenter piano; margine sat crasso, integerrimo, haud 

 multum prominente, atro (nonnumqnam primnm albosnffnso), 

 ssepe subnitido, persistente. Hypothecinm pallidum; thecinm 

 + nigricans v, fusco-olivaceum, KOH immutatnm. Sporje in 

 ascis inflato-clavatis 8:n8e, dyblastae, ovoidese v. ovoideo-ellip- 

 soidese, medio non constrictse, (23 — )25 — 27( — 28) ^i longae, 

 (14 — )15 — 16( — 17) pi crassse, episporio valde et insequaliter 

 inerassato (miseboblastiomorphse). 



Crusta KOH + lutescens; hyphre medullares J non rea- 

 gentes; gonidia snbglobosa, vnlgo 8 — 11 f^i crassa. Pars mar- 

 ginalis excipuli sat tennis, saltem vnlgo gonidia nnlla fovens, 

 p. p. maxima nigricans, J non reagens; margine proprio sub- 

 nullo. Thecium 100 — 125 {.i altum, J persistenter coerulescens; 

 paraphyses graciles, circiter 1 }.i crassse, sat arcte cohserentes, 

 simplices v. superne nonnibil ramosse, apicibus clavatse, usque 

 ad 4 }.i crassse. Sporae ut in H. cons^^ersa, at semper maj öres. 



Habitat ad saxa duriora (gneissacea). 



Specimina reportavimus e Rio Grande do Sul: Serra dos 

 Tapes, Cascata de Hermenegilda haud procul ab oppido Pe- 

 lotas (18 12 12 92. N:o 775 E. — 1813 12 92. N:o 778.). 



Crustse indole et praesertim sporis majoribus a R. conspersa Mull. Arg. 

 differt; quoad sporas cum R. argentiniana Mull. Arg. (Flora 1889, p. 511) 

 sat bene congruit, quacum forsan sit conj ungenda, etsi crusta disaimilis. Duo 

 tantum reportavimus specimina. 



