314 
PLANT STUDIES 
gemmae fall off and develop new thallus bodies, making 
rapid multiplication possible. Marchantia also possess re- 
markably prominent gametophores, or " sexual branches " 
as they 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. 286, 287), and known as the "archegonial 
branch." The scalloped antheridial disk and the star- 
shaped archegonial disk, each borne up by the stalk-like 
gametophore, are seen in the illustrations. 
204. Jungermannia forms. 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 drier 
FIG. 288. Two liverworts, both Jnngermannia forms: to the left is Blasia, which 
retains the thallus forms but has lobed margins ; to the right is Scapania, with 
distinct leaves and sporogonia (A). GOLDBERGER. 
situations on rocks, ground, or tree-trunks ; or in the tropics 
also on the leaves of forest plants. They are generally deli- 
cate plants, and resemble small Mosses, many of them doubt- 
less being commonly mistaken for Mosses (Fig. 288). 
Instead of a flat thallus with even outline, the body is 
