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brillesus aut nudus, solo puncto centrali arcte adnatus, supra umbili- 
catus. Apothecium: exeipulum proprium, carbonaceum, orbieulatum; 
thalamium normaliter” prolifieatione varie plicatum, plieis, rupto tan- 
dem escipuli margine, in lirellas aggregatas solutis. 
9. Umbilicaria Hoffm. — Lich. polyphyllus Linn. 
VI ®armeliacei. Thallus frondosus, prostratus vel adscen- 
dens, subtus varius. Apothecium: exeipulum thallodeum, orbicula- 
tum, normaliter solo centro adfısum; thalamium planum vel tumidu- 
lum, colere varium. 
10. Physeia Schreb. Thallus lineari-laciniatus, subtus cana- 
dieulatus, discolor, nudus. 'Apothecium: subpedicellatum, terminale 
vel laterale. — Lich. furfuraceus Linn. 
11. Sticta Schreb. Thallus laciniato -lobatus, subius tomen- 
tosus, gibbis nndis vel eyphellis distinetus, Apothecium sessile, mar- 
ginale vel superficiare, cum thallo subconcolor (fascum). — Lich. 
pulmonarius Linn. 
12. Parmelia Ach. Tihallus varie laciniatus vel squamulosus, 
subtus aeguabilius, subfibrillosus. Apothecium sessile, superfieiare, 
colore varium. 
a. LobariaSchreb. Tihullus laciniatus, laciniis latis, sinuato- 
lobatis, lobis rotundatis, laxius adnatis. — Lich. quercifolius Linn. 
b. Imbricaria Schreb. Thallus laciniatus, laeiniis sinuato- 
lacinulatis centrifugis, imbricatis, angustis, arctius adnatis, — Lich. 
physodes Liun. 
- e. Squnmaria Hoffm. Thallus squamulosus, squamulis imbri- 
eato-lobatis. — Lich. hypnorum Vahl. 
VN. Lecanorini. Thallus erustaceus, efligaratus vel unifor- 
mis, Apothecium: exeipulum thallodeum, orbiculatum, normaliter 
totum adnatum; thalamium concavum, planum, interdum tumescens. 
13. Lecanora Ach. ’hallus effiguratas vel uniformis. Apo- 
thecium: thalamium constanter denudatum, normaliter immarginatum, 
planum vel tumidum, colere varium. 
a. Psoroma Ach. Thallus squamulosus, squamulis centralibus 
in crustam areolataın confertis. — Lich. erassus Huds. 
b. Placodiun Hill. Thullus ad ambitum stellato - radiatus, 
ceutro rimoso-areolatus., — Lichen murorum Hoff. 
c. Rinodina Ach, Thallus uniformis. — Lich. subfuscus 
Linn. 
14. Urceolaria Ach. Thallus uniformis. Apothecium: tba- 
