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SECT. II. MARCHANTIACE.E. 



Evanginulatae. Capsula externa? frondi externa sita, in- 

 terna irregulariter, rarissime valvatim, dehiscens. 



Herbae frondosae, habitu variae, cuticulosae vel ecuticulosae. 

 Frondes binatim divisae. Fiores monoici vel dioici. 



Masculi, antherae in sacculis e frondis substantia conflatis 

 paginam superam hiantibus contentae, solitariae (an semper ?) 

 receptaculo sessili, vel rarius pedunculated 



Faminei, unico (Asolenio) excepto hypophylli, solitarii vel 

 aggregate plerumque frondis partem deformatam (receptacu- 

 lum auctorum) pedunculatam occupantes, involucro simplici 

 et valvato, vel duplici et vel in complete valvato, vel evalvato 

 obtecto. Peduncuculus receptaculi uni-vel bisulcatus. 



Capsula externa demum eruptione interna varie lacera, basi 

 saepissime persistens ; interna plerumque sub sessilis, pariete 

 interna e cellulis fibrosis vel simplicibus conflatae. 



Eluteres vel heteromorphae vel nulla?, sporula tunica com- 

 posita vel simplici instructa. 



* Cuticulosce. 



Cuticula supera stomatibus maximis quasi perforata, infera 

 estomatosa, radicularum e parenchymatis strato infimo orta- 

 rum cursu hinc illinc disrupta in squamas margine uno tan- 

 tum affixas, venam versus attenuatas, et oblique convergentes. 



Essential Points of Marchantiaceous Structure. 



Radiately frondose, (when there is an apparent axis with 

 foliaceous expansions, these are obliquely inserted, and gene- 

 rally irregular in size etc.) 



Organs of aeration, none in the so called foliaceous species, 

 or in many of the frondose ones, but in the more typical ones 

 they are highly developed, and indubitable apertures from so- 

 lution of continuity. 



Sexes present. 



