292 
rimali, Zhallus crustaceus. — Obs. 'Thalamia saepe excipulo orbata, 
hine immarginata , diflormia ei radiato-stellata. (Arthonia Ach.) 
18. Umbilicaria Hoffm. Apothecium patellare, orbieulatum; 
thalamium prolificatione varie plicatum, rarius integrum. Thallus 
frondosus, lobatus, solo puncto centrali saxis adfıxus, supra umbili- 
eatus. 
U. Cl. Lichenes enpitati. 
Ordo 1. Floccoso-pulverulenti. 
19. Cyphelium Ach. Apothecium: excipulum patellare, carbo- 
naceum, planum vel turbinatum, marginafum, substipitatum vel ses- 
sile; thalamium concavum, plauum vel tumidum. T’hallus erustaceus. 
20. Calicium Pers. Apothecium: excipulum patellare, carbo- 
naceum, turbinatum, marginatum , stipitatum; tbalamium planum vel 
lentiforme. Thullus erustaceus. . 
21. Coniocybe Ach. Apotheeium: thalamium sphaerieum, 
stipitatum , stipiti absque excipulo peculiari iofixum. Z'hallus erustaceus, 
22. Sphaerophorus Pers. Apothecium: excipulum sphaericum, 
thallodeum, tandem dehiscens, extremis ramulis thalli fruticolosi 
insidens. 
Ordo 2. Solidi. . 
23. Stereocaulon Schreb. Apothecium: thalamium lentiforme, 
(fuscum), compactum, extremo stipiti ejusque ramulis Jilatatis absque 
exeipulo peculiari insidens. Thallus tartareo-granulosus, stipites agens 
solidos, exfus crustaceos. 
24. Baeomyces Pers. Apotheeium: thalamiom sphaericem, 
intus araneosum, extremo stipiti absque exeipulo peculiari infixum. 
Thallus tartarens, stipites agens solidos, strato cerustaceo orbatos. 
25. Cladonia Hoffm. Apothecium: thalamium e peculiari exci- 
pulo seyphuliformi prodiess, primum orbieulatum, planum et margi- 
natum, dein sphaericum, fungosum, exeipulum abscondens, stipitum 
subulatorum extremitatibus vel seyphiferorum oris insidens. Thallus 
microphyliinns, rarius erustaceo - granulosus, stipites agens fistulosos, 
subulätos et turbinato-scyphiferos. 
II. Cl. Lichenes verruenrioidei. 
Ordo 1. Ectocarpei. 
26. Segestria Fr. Apothecium: excipulum sphaerieum, pro- 
prium, ceraceo-membranaceum, eoloratum, apice papillula vel ostiolo 
instructum, thalamium gelatinosum servans. T’hallus crustaceus. 
27. Verrwaria Wigg. Apothecium: exeipulum sphaericum, 
