314 



PLANT STUDIES 



gemraas fall olf and develojo new tliaJlus bodies, making 

 rapid mnltiplication possible. Marcliantia also possess re- 

 markably prominent gametojihores, or "sexual branches" 

 as tliey are often called. In this case the gametophores are 

 differentiated, one bearing only antheridia (Fig. 285), and 

 known as the " antheridial branch," the other bearing only 

 archegonia (Figs. 2S(;, 387), and known as the "archegonial 

 bran(di." The scalloped antheridia] disk and the star- 

 shaped archegonial disk, each borne np by the stalk-like 

 gametojihore, are seen in the illustrations. 



204. Jungermannia fonns. — This is the greatest line of 

 the Liverworts, the forms being much more numerous than 

 in the other lines. They grow in damp places; or in ilrier 



Flii. im. Two liviTwdrts. Iinlh .IniiL'rrmaiiiiia forms: to the- left is Hhixia. wliicli 

 ri'taiiis llic lliiilhis Ion, IS Iml has lohi-d jnaiyiiis ; to tin- li^'lit is .sv,)/,,;;,;,;, u itii 

 distinct loavc's and sporo^onia l .1 1, -Oolihikkokk. 



situiitions on roeks, gronnd, or trce-tniiiks ; or in I he tropics 

 also on the Ica.ves of forest phints. They are generally ileli- 

 ctite |ilaiils, iiiid i-esemblc smtdl flosses, many of them doubt- 

 less hciiig comnioiily misttikcn for flosses (Fig. 288). 



Insteati of a lltit thallus with even outline, the body is 



