412 NOUVELLE CLASSIFICATION 
laxeimplexa, internee fasciculo centrali crasso filamentoruur 
longitudinalium adglutinatorum contexta. Apothecia leca- 
norina, margine plerumque ciliata, ciliis textura. thalli; 
sporæ parvæ simplices. 
Usnea, Hoffm. — Chlorea, Nyl. 
Trib. VIII. Ramalines. 
Medulla thalli teretis vel sæpius compressi laxa, centro 
interdum cava. Apothecia lecanorina, margine thallino tenui 
integro. 
Alectoria, Ach. pr.p. — Evernia, Ach. — Ra- 
malina, Ach. — Dufourea, Ach. 
Trib, IX. Cetrarieo. 
Thailus rigens plerumque compressus fruticulosus vel fere 
foliaceus, intus filamentoso-stuppeus, superficie (epithallo) 
lævigatus, solito spadiceo-coloratus. Spermatia cylindrica. 
Cetraria, Ach. pr.p. 
Series IV. PHYLLOIDEE. 
Thallus e fronde consistens dilatata, lobata aut stellato- 
laciniata (rarissime fruticuloso-cæspitosa), medulla media e 
filamentis laxe implexis formata, gonidia strato peculiari ver- 
sus superam thalli paginam sub cortice disposita. Apothecia 
peltiformia vel lecanorina vel lecideina et gyrose contorta. 
Trib. X. Corniculariezæ. 
Thallus rigidiusculus fruticulosus (seu exceptione unica 
filamentosus) vel sæpius membranaceo-dilatatus, lobatus. 
Spermatia tenuia vel versus utrumque apicem obsolete cras- 
siuscula vel versus alterum modo fusiformiler incrassata 
(tunc fusiformi-clavata forsan potissime dicenda). Tribus 
Cetrarieis proxima, ab iisque forte haud separanda. 
Platysma, Hoffm. pr. p. — Cornicularia, Ach. 
em. char. 
Sd a iio Bout 
