V.— PTERYGIUM Nyl. 
Thallus adpressus tenuiter divisus, ambitu radians, intus se- 
ctione polita, granulis gonimis (sepe moniliformi-coneretis) sub 
strato corticali precipue dispositis; lamina tenuis thalli latere 
infero ccerulescens. Apothecia lecideina. 
1. Pt. pannariellum Nyl. in Sällsk. pro F. et Fl. F. 
Notis. 4 (n. ser. D, p. 236. 
Thallus obscure olivaceus vel olivacee fusco-nigricans opa- 
cus intricatus, ambitu radiatus, medio subcoralloideo-multifidus 
vel microphyllinus, laciniis ambitus tenuibus (passim planis) 
densis vel imbricato-confertis multifidis obsolete rugulosis, me- 
diocris (latit. circa pollicaris, altit. 0,5—1 millim.), medio se- 
' pius diffracto-glebulosus; apothecia non visa. 
. - Supra rupes graniticas Savolaxie, ad ripas lacuum (Edwin 
ODENSE in Satakunta (A. J. Malinerenid. Etiam in Suecia 
fex hb. Ach:): 
2. Pt. asperellum (Ach.). — Collema asperellum Ach. 
LUP: 629; Syn; pi 308. 
Sat simile Pterygio pannariello, thallo teneriore, ambitu fi- 
brillose radiante, radiis fibrilliformibus subeylindricis rugulosis, 
centro minute granuloso (diametro granulorum et radiorum sub- 
equalibus); apothecia non vidi. 
Supra calcem (transitionis) ad Mare Glaciale (Wahlenberg). 
Tr. I. — COLLEMEIL 
Thallus maxime varius, crustaceus, granulosus, vel lobatus, 
laciniatus, vel microphyllinus; granula gonima glauco-virentia, 
aut moniliformi-disposita aut varie dispersa. Apothecia leca- 
norina, aut paucis biatorina, adhuc paucioribus endocarpea. 
I. — PYRENOPSIS Nyl. 
Thallus crustaceus tenuis granulato-areolatus, laxe cellulosus 
 (granulis gonimis in his cellulis receptis).  Apothecia urceolato- 
: 4; 
