Fig. 282. Two common liverworts : to the left is Conocephalvs, a Marchantia form, 

 6howing rhizoids, dichotomous branching, and the conspicuous rhombic areas 

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

 and pod-like sporogonia. — GoLDEEitGER. 



Pig. 283. CrosB-sections of thallus of Marchantia: A, section from thicker part of 

 thallus, where supporting tissue (;» is abundant, and showing lower epidermis 

 giving rise to rhizoids (A) and plates (6), also chlorophyll tissue {eld) organized 

 into chambers by partitions (o)\ B, section near margin of thallus more magnified, 

 showing lower epidermis, two layers of supporting tissue (p) with reticulate walls, 

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

 often brandling filaments whose cells contain chloroplasts (<•/;/), overarching 

 upper epidermis (o) pierced by a large chimney-like air-pore («;».— After Goebel. 



