

















1 



386 



Dr. J. Müller. 





8. Pyrenastrum. 



Pyrenastrum Eschw. Syst. Lieh. p. 16. lig. 15 (1824), non Tuck. 



1 . P. cubanum Müll. Arg.; thallus flavescenti-v. olivaceo-pallidus, tenuis. 

 nigro-limitatus; stromata depresso-hemisphaeriea, majuscula, 1 1 / 2 — 1% mm. 

 lata v. confluentia, duplicia et triplicia, simplicia pericentrice 4 — 10-carpa, 

 apice depresso in ostiolum mamillare emergens aurantiaco-fuscum v. demuni 

 nigricans abeuntia; apothecia longicolla, valde inclinata, fusco-nigra, super- 

 ne plusminusveinter seconnata; asci8-spori; sporae imbricatim l-seriales, 



fuscae, oblongato-elli])soideae, 4-loeuIares, circ. 18 — 24 u lonuae et 8 



• 



10 jx 



latae. — Proximum guyanensi et brasiliensi Pyrenastro septicollari 

 Eschw., sed apothecia et Verrucae majores, haealtius emersae et thallus palli- 

 dior, sabflavicans. Non parum ludit thallo plus minusve flavescente, verru- 



cis varie cenfluentibus et numero apotheciorum cujusvis Verrucae. — Verr. 

 Cub. 136, 138a (Astrothelium cubanum Nyl. in Flora I876. p. 365, 





sine char.), 186, II {677, 67 



2. P* cryptothelium Müll. Arg.; thallus flavescenti-olivaceus, crassus, de- 

 in um areolatim ruptus, superficie laevigatus : slromata leviter emergentia, 





circ. 3 — 6-carpica, vertice declorato-fuscidula, confertim 3 — 6-stomatica v. 

 etiam confluentimmonostomatica; apothecia nigra, conniventia, inter se plus 

 minusve connata, teeta; sporae fuscae, 4-loculares, in ascis imbricatim I- 



b- 



— AP. cubano differt sporis 



seriales, 28 — 35 u longae et 13 — 14 jx latae. 









fere duplo majoribus, thallo crasso et apotheeiis demum non nudato-perspi- 

 cuis. Affine videtur Pyrenastro cl an de st ino, sc. Astrot hei io clan- 

 destino Nyl. (a nie non viso), sed thallus alius. — Verr. Cub. 1 40 (Astro- 

 th e li u m cryptothe I ium Nyl. I. c. sine char.). 



9. Lithothelium . 

 Thallus crustaceus, amorphus; gonidia chroolepoidea ; apothecia in 



stromale ' communi apice confertim pluriostiolato v. confluentim 1-ostiolato 

 coadunata (inter se distincla), angiocarpica, convergentia, supra in Collum 

 attenuala ; paraphysescapillares; sporae hyalinae, transversimdivisae, loculi 



cylindrici. 



Est quasi Sagedia Körb, composita. — Spermogonia pluri- 



nucleata, »spermatia« tenuissime bacillaria, elongata, leviter sigmoidea. 



L cubanum Müll. Arg.; thallus tenuissimus, cum saxo conferruminatus, 





laevigatus, albus v, flavescenti-albus ; stromata 1 — i^nim. lata, pro 2 / 3 

 altitudinis in foveolis saxi innata, parte emergente depresso -conica, regu- 

 laria, vertice subdepresso confertim 3 — 6-ostiolato leviter mamillaria, ex- 

 tus nigra, intus tota fusca v. nigro-fusca, minus tarnen atrala quam ipsa 

 perithecia quae vulgo 2 — 6 in quoque slromate, subperipheriee Sita aut et 

 unum in centro, integre nigra, globosa, apice in Collum longum abeuntia; 

 nuclei albi; paraphyses firme capillares et longae; asci late lineares; 

 sporae in ascis imbricatim 1 -seriales, oblongalo-ellipsoideae, demum 



