Pyrenocarpeae. 



Apothecia pyrenocarpica, perithecio nucleum sive hy- 

 menium includente. Nucleus subglobosus aut hemisphaericus, 

 discum nudum, apices paraphysum continentem, haud for- 

 mans. Thallus gonidiis instructus aut iis destitutus, qua nota 

 Pyrenocarpeae in Pyrenolichenes et Pyrenomycetes dividun- 

 tur, qui tantum divisiones biologicae nee systematicae sunt. 



A. Pyrenolichenes. 



Thallus algas continens, stroma gonidiiferum formans. Apothe- 

 cia pyrenocarpica. Nucleus (vel hymenium) apothecii subglobosus aut 

 hemisphaericus, perithecio inclusus, discum nudum, apices paraphysum 

 ascorumque continentem, haud formans, jodo vulgo reagens. Perithe- 

 cium ex hyphis conglutinatis formatum, gonidiis destitutum, thallo 

 substratove immersum aut amphithecio thallino, gonidia continente vel 

 gonidiis destituto, obductum, aut prominens nudumque, globosum de- 

 pressumve aut subconoideum aut lenticulare aut hemisphaericum aut 

 raro appendicibus instructum (aut plura varie confluentia), diu clausum, 

 demum ostiolo rotundato aut raro irregulari instructum aut fissura vel 

 apertura irregulari aperiens. Conidia in conidangiis et stylosporae 

 (macroconidia) in pyenidiis (in Strigula et Verrucaria) formata. Gonidia 

 vulgo chlorophycea (Pleurococcus aut genera ei affinia, velut Coccobotrys 

 et Hyalococcus sec. Chodat et Waren, Trentepohlia umbrina et iolithus, 

 Hetcrothallus, Phycopeltis, Cephaleuros et genera haud exactius cognita), 

 raro cy anophy cea (Gloeocapsa, Scytonema, Nostoc) In nucleo apothecio- 

 rum in nonnullis generibus algie Stichococco proximae vigent. 



B. Pyrenomycetes. 



Apothecia pyrenocarpica. Nucleus (vel hymenium) apothecii sub- 

 globosus aut hemisphaericus, perithecio inclusus, discum nudum, apices 

 paraphysum ascorumve continentem, haud formans, membranis asco- 

 rum paraphyphysumque et gelatina hymeniali ex iis formata jodo vulgo 

 haud reagentibus. Mycelium stroma gonidiiferum haud formans, nee 

 symbiotice cum algis vigens, aut raro fortuito vel regulariter supra 

 algas parasitans easque devastans consumensve. 



