1 Stzbgr., Lich. Afric., n. 874. 
A. Zahlbruckner, Afrikanische Flechten (Lichenes), 503 
… cincti, myriospori; sporae decolores, simplices, ellipsoideae, ad 2 u longae. — 
Pycnoconidia non visa. 
Deutsch-Südwestafrika: Haifischinsel in der Lüderitzbucht, auf 
Schiefer (Fincke). 
Von den übrigen gelben Acarosporen mit plakodinem Thallus durch die große 
Dünnheit desselben verschieden. 
Pertusaria melaleuca Duby, Botanic. Gallic., vol. II (1830) p. 673; 
Kapland: Zwartkops bei Port Elizabeth, auf Portulacaria afra 
(BRUNNTHALER). 
Lecanora chlarona (Ach.) Nyl. | 
Kapland: Zwartkops bei Port Elizabeth, auf Portulacaria afra 
(BRUNNTHALER). 
Lecanora placodina A. Zahlbr. in Annal. Mycolog., vol. XIX. (1921) 
p. 240. — Thallus in specimine nostro 7 cm latus, lutescenti-cervinus, sub- 
opacus, KHO lutescens, GaCl,0, —, subtartareus, primum verrucas plus minus 
discretas, rotundatas vel irregulares formans, demum squamulosus, squamis 
1—2 mm latis, substrato arcte non adhaerentibus, congestis vel subimbri- 
catis, marginalibus nonnihil subplacodiiformibus, convexiusculis, ad ambitum 
hinc inde paulum dilutioribus, superne laevibus, subtus pallidis, rhizinis 
nullis, sorediis et isidiis non praeditis, superne strato corticali crassiusculo, 
50—140 u alto obductus et strato amorpho tenui, 5—8 yp. crasso tectus, 
‘caeterum paraplectenchymatico, cellulis subpolygonis, 3,5—9 y latis; gonidia 
infra corticem sita, congesta, inferne magis dispersa, cellulis globosis, 5,5— 
9 u latis, laete viridibus; medulla cinerascens, KHO —, CaCl02 —, 1 ru- 
fescens, inferne tenuiter infuscata. — Apothecia demum sessilia, dispersa 
vel approximata, rotunda vel rotundata, parva, usque 4 mm lata, plano 
bene convexa vel fere semiglobosa; discus rufescenti-fuscus, nitidulus; margo 
thallinus primum distinctus, thallo concolor vel paulum pallidior, discum 
aequans, tenuis, subcrenulatus, demum omnino depressus, apothecia dein 
habitu biatorina; epithecium distinctum nullum; hypothecium decolor, ex 
hyphis dense intricatis formatum, I dilute coerulescens, strato gonidiali super- 
| positum, quod stratum usque ad verticem marginis thallini assurgit; ex- 
cipulum ad latera hymenii bene evolutum, decolor, ex hyphis parallelis, 
conglutinatis formatum; hymenium angustum, 50—70 u altum, purum, de- 
color, superne rufescens, I e coeruleo obscuratum; paraphyses densae, strictae, 
simplices, eseptatae, filiformes, ad apicem parum latiores; asci hymenio 
subaequilongi, oblongo- vel ellipsoideo-clavati, superne rotundati et mem- 
brana bene incrassata cincti, 8 spori; sporae in ascis plus minus biseriales, 
decolores, simplices, ellipsoideae vel fere ovales, membrana tenui cinctae, 
8,5—12 y longae et 7—8,5 p latae. — Conceptacula pycnoconidiorum im- 
 mersa, globosa; perifulcrium pallidum, fulcra exobasidialia; basidia fasci- 
