887 
Kam. IV. Lichenaceae. 
Thall. quam maxime varius, ut filamentosus, fo- 
liaceus, crustaceus, pulvereus vel denique nullus, 
raro opace fusco-ater coloratus, substantia gela- 
tinosa nulla inter elementa ejus penetrante. Chlo- 
rophyllum gonidiorum laete viride, raro aurantia- 
cum ichrysogonidia). Thalamium texturae propriae 
(a thallo diversae) adest, ut plurimum e paraphy- 
sibus constitutum vel alias e strato cavitatibus modo 
cellularibus angustis excavato ,„ raro ejus loco fere 
nonnisi mucilago hymenea copiosa obvenit paraphy- 
siumque tantum vestigia obsoleta. 
Series l. Coniophoreae. Apoth. stipite suppor- 
tatum aut ab hypothecio aut a podetio thallino for- 
mato, raro sessile. Sporae maturae liberae minu- 
tae, pulverem sistentes denique denudatnm, a ven- 
tis aquave disseminandae. 
Trib. 1. Calicioöideae 
mulosus, pulvereus vel obsoletus. 
pitatum vel sessile cupulare. Trachyliu Fr. 
cium Ach. Coniocybe Ach. 
Trib. 11. Sphaerophoreae. Podetia cortice cor- 
neo medullam e filamentis laxe intertextum inclu- 
dentia. Apoth. in apieibus podetiorum clavatim di- 
latatis recepta, vetustiora dehiscentia varieque aperta. 
Sphaerophoron Pers. 
Thall. granulosus, squa- 
Hypothecium sti- 
Cali- 
Series II. Cladonioideae. Podetia foliola ho- 
rizontaliter expansa vel graniformia gerentia, aut 
e crusta effusa emersa. Apothec. lecideina vel bi- 
atorina. j 
Trib. Ill. Stereocauleae, Podetia solida e fila- 
mentis adglutinatis formata , gonidia in foliolis gra- 
niformibus podetiis adfixis obvenientia. Apoth. leci- 
deina (nigra). Stereocaulon Schreb. 
Trib. IV. Cladonieae. Podetia fistulosa e fila- 
mentis adglutinatis formata inter quae dispersa ad- 
sunt gonidia. Foliola thalli (ubi non deficiunt) stru- 
cturae ejusdem ac podetia. Apoth. biatorina (varie 
colorata) Cladonia Hoffm. 
Trib. V, Baeomyceae. 'hall. crustaceus pro- 
ferens podetia e filamentis formata, brevia simpli- 
cia, apothecio unico biatorino terminata 
ces Pers. 
Series III. Intricatae. Thallus fruticulosus vel 
filamentosus, ramosus , teres vel compressus (abs- 
que foliolis ullis vel crusta basali); gonidia zona- 
tim inter radices filamentorum medullarium sub 
strato corticali undique disposita. -Apothec. lecano- 
rina vel lecideina, 
Trib. VI. Roccelleae. Thall. cortice corneo te- 
nui, medulla copiosa filamentis implexis consistens, 
jodo addito coerulescentibus. Apoth. normaliter le- 
cideina. BRoccella DC. 
Baeomy- 
— 888 
Tribus VIL. Usneae, Thall. ramosissimus teres, 
medulla externe e filamentis laxe implexa, interne 
e fasciculo centrali crasso filamentorum Jongitudi- 
nalium adglutinatorum contexta. Apothec. lecano- 
rina, margine plerumque ciliata, ciliis textura thalli; 
sporae parvae simplices. Usnea Hoffm. ChloreaNyl. 
Trib. VIII. Ramalineae. Medulla thalli teretis 
vel saepius compressi laxa, centro interdum cava. 
Apothecia lecanorina, margine thallino tenui inte- 
gro. Alectoria Ach. pr. p. Evernia Ach. RBama- 
lina Ach. Dufourea Ach. 
Trib. IX. Cetrarieae. Thall. rigens plerumque 
compressus, fruticulosus vel fere foliaceus ,„ intus 
filamentoso - stuppeus ,„ superficie (epithallo) laevi- 
gatus, solito spadiceo - coloratus. Spermatia cylin- 
drica. Cetraria Ach. pr. p. 
Series IV. Phylloideae. Thallus e fronde con- 
sistens dilatata, lobata aut stellato -laciniata (ra- 
rissime fruticuloso - caespitosa); medulla media e 
filamentis laxe implexis formata, gonidia strato pe- 
culiari versus superam thalli paginam sub ’cortice 
disposita. Apoth. peltiformia vel lecanorina vel le- 
cideina et gyrose contorta. 
Trib. X. Cornicularieae. Thall. rigidiusculus 
fruticulosus (seu exceptione unica filamentosus) vel 
saepius membranaceo -dilatatus ,„ lobatus. Sperma- 
tia tenuia vel versus utrumque apicem obsolete 
crassiuscula vel versus alterum modo fusiformiter 
incrassata (tunc fusiformi-clavata forsan potissime 
dicenda). Tribus Cetrarieis proxima, ab iisque 
forte haud separanda. Platysma Hoff. pr. p. Cor- 
nicularia Ach. em. char. 
Trib. XI. Peltigereae. Frons dilatata, strato 
corticali in pagina infera deficiente. Apoth. pelti- 
formia, marginalia, ad paginam superam thalli aut 
inferam sita, vel in lamina frondis sparsa. Spo- 
rae in illis fusiformi - cylindricae, in his bilocula- 
res fuscae. Nephroma Ach. Peltigera Hoff. So- 
lorina Ach. 
Trib. XI. Purmelieae. Thall.. lobatus, varie 
divisus aut stellato - laciniatus; apoth. lecanorina 
Ch. e. a thallo evidentius marginata quam in tribu 
praecedente) vixque nisi in formis degeneratis bi- 
atorina Ch. e. margine thallino non cincta). Sticta 
Ach. Parmelia Ach. Physcia Fr. - 
Trib. XIll. Gyrophoreae. Thall. dilatatus, pel- 
tatus, umbilicato -adfixus; apoth. lecideina simplicia 
vel gyrose plicata. Umbilicaria Hoffm. 
Series V. Placodeae. Thall. e crusta consi- 
stens variae indolis (squamosa, radiata, granulosa, 
pulverea, aut in infimis nonnumquam nulla), abs- 
que strato ullo medullari medio e filamentis laxe 
contexto, apothec. lecanorina, biatorina, lecideina, 
| vel lirelliformia. Thall. raro hypophloeodes (hpo- 
