Fig. 93. Two common liverworts : to the left is Conocephahis^ a Marchantia form, 

 showing rhizoicls, dichotomous branching, and the conspicuous rhombic areas 

 (areolae) on the dorsal surface; to the right is Anthoceros, with its simple thallus 

 and pod-like sporogonia.— Goldberger. 



Fio. 94. Cross-sections of thallus of Marchantia: A, section from thicker part of 

 thallus, where supporting tissue (p) is a])undant. and showing lower epidermis 

 giving rise to rhizoids {h) and plates (6), also chlorophyll tissue (r///) organized 

 into chambers by partitions (O); B, section near margin of thallus more magnified, 

 showing lower epidermis, two layers of supporting tissue {])) with reticulate walls, 

 a single chlorophyll chamber with its bounding walls (s) and containing short, 

 often branching filaments whose cells contain chloroplasts {chl), overarching 

 upper epidermis (o) pierced by a large chimney-like air-pore (s/j).— After Goebkl. 



