SUBORDINUM, TRIBUUM ET SUBTRIBUUM. 1X 
Subtribus VII. Fossomspronte&. Plante foliosz vel sepius frondose, pro 
more prostrate, radicellosze; in Scalia autem basi rhizomatosé ramosa 
matrici adfixe, omnino arhize; subdichotome, speciebus frondosis 
rarlus postice subramosis. Caulis plerumque subplano-convexus, a 
frondis pagina bene definitus; vel preelatus, cum pagina utrinque con- 
fusus. Folia (ubi adsunt) succuba, sat lata, seepe carnosula, siccando 
flaccida. oliola, preter in Scalia, nulla. Frondes lineares vel obo- 
vate, integerrime vel serrulate, interdum pinnatifide, in Petalophyllo 
supra lamellose. Flores $ in caulis tota longitudine submarginales ; 
antheridia 2—dna, foliis viz velata ; in aliis tam foliosis quam frondosis 
in alveolis epidermidi opertis, utroque caulis latere ordinatis, 2-3na ; 
vel (in aliis) alveolis apertis monandris bractea minuta incurva suffultis 
recepta. Pertanthiwm mcomplete (solum in Pallavicinia pertecte) 
tubulare; in multis autem nullum adest. Calyptra raro parva, pler- 
umque elongata carnosa, ab involucro et perianthio libera, recepta- 
culo autem szepe plus minus alte concreta. Pistillida sterilia yel 
calyptre plus minus alte (interdum solo apici) adnata, vel super 
caulem seriata, nuda. Capsula in Typicis subglobosa, 2—5-strata, plus 
minus irregulariter dehiscens ; in § Leptotheceis cylindracea, 1-strata 
valuulis 4, regularibus, vel solum uno latere dehiscens. Elateres 2-4- 
(raro 1-) spiri, omnes simul, vel alii paulo tardius deciduii—P. 523- 
539. 
b. Elateres monospiri, utroque fine acutissimi ; pauci autem apicales 
breves rigidi diutius persistentes. 
Subtribus VIII. Merrzcerte®. Plante frondose, dichotome vel pin- 
natim ramos, laciniis linearibus; rami in altero genere (Anewra) 
omnes laterales, costa lata laxius cellulosa subtus radicellosa, pagina 
nulla vel perangusta, raro sat lata; in altero generi (Metzgeria) rami 
rarissime laterales et pinnati, floriferi omnes (interdum etiam eflori- 
feri) postici, radicellis e costa margineque, subinde etiam e tota super- 
ficie ortis. Genitalia utriusque sexus in ramuli abbreviati costa disticha ; 
pistillidia 2-20-juga, astyla; antheridia sepius magis numerosa, 
rarissime 4-sticha. Perianthium nullum. Calyptra magna clavata, 
carnosa, in Aneura sepius papillosa, in Metzgeria radicellis hirta. 
Capsula elongata, ad basin usque 4-valvis, bistrata. Elateres apicales 
fixi, cum ceteris liberis intexti, in penicillos quatuor supra capsulam 
apertam porrectt.—p. 539-556. 
Susorpo II. MARCHANTIACEZ, 
Frondes plus minus carnose, prostrate, late et indistincte costate, 
supra venoso-areolate, areolis pro more uniporosis, strato hypoporo 
