203 



branching (Fig. 306). In the 

 fully developed trichoblast all 

 the branches are arranged fan- 

 like in one plane, the trichoblast 

 turning its flat side against the 

 main filament (Fig. 305). The 

 basal cell of the trichoblasts 

 bears no side-branch, is very 

 short and more or less sunk 

 between the pericentral cells; 

 then follows a short cell bearing 

 the first side-branch. This is al- 

 ways found at the right, ano- 

 dic, side of the trichoblast. It 

 begins with a short, basal cell. 

 In the next branch the basal 



Fig. 305. Lophocladia trichoclados 

 (Mert., C. Ag.) Schmitz. Part of a fila- 

 ment with trichoblasts. (About 45: 1). 



cell is still short, though somewhat longer. The first side-branch 



of the trichoblast is that which is trans- 

 formed into the stichidium (comp. Figs. 

 306 and 307). 



In the fully developed trichoblasts 

 the cells are long and cylindrical, about 

 23 p thick and 250 a long, somewhat 

 shorter and thicker towards the bottom, 

 longer and thinner towards the top. 



Exogenous branches formed in the 

 summit of the plant seem to be entirely 

 wanting. I have looked for them in 

 vain, and FALKENBERG did not find 

 them either. The ramification of the 

 plant takes place by means of endoge- 

 nous, adventitious branches, formed la- 

 ter. The segments in the main filaments 

 are about 175 ij. broad, being scarcely 

 double this length, about 270 long. 



In the upper young parts of the 

 filaments no cortical layer is present; 

 the older parts of the filaments on the 

 other hand are more or less covered by 

 cortex. The first beginning of the cort- 

 ical layer is formed by rhizoids growing 



Fig. 306. Lophocladia tricho- 

 clados (Mert., C. Ag.) Schmitz. 

 Young trichoblasts near the 

 summit of a filament, show- 

 ing development of stichidia. 

 The uppermost one is still 

 undivided, the following con- 

 sists of four cells, the lower- 

 most of five. (About 260: 1\ 



