304 



D ansk Botanisk Arkiv, Bd. 3. Nr. 1. 



f 



out from the basal end of the pericentral cells (comp, Fig. 

 307) and running down in the furrow between these cells 

 (Fig. 305). 



Most of my specimens were richly provided with stichidia 

 (Fig. 307). As the figure 306 shows, these originate from the first 

 side branch of the trichoblast which issues from the second joint 

 in these. One or two segments in the basal part of the stichidia 

 remain undivided. All the following segments become polysipho- 



nous with the exception 

 of some of the uppermost 

 ones, which are small, ste- 

 rile and not divided. As 

 described by Schmitz (1. c, 

 p. 233) the stichidia are 

 unbranched, but this is 

 only apparently so, accor- 

 ding to Falkenberg's ob- 

 servations. For, as pointed 

 out by this author, a small 

 cell is cut off from each 

 segment by an oblique 

 wall, these small cells pla- 

 ced with a divergency of ^U 

 round the stichidia, being 

 the first beginning of bran- 

 ching. Normally these cells 

 are not further developed, 

 and I have not succeeded 

 in finding any stichidia 

 with branches, but Fal- 

 kenberg happened to find 

 one in which the cells in the 



Fig. 307. Lophocladia trichoclados (Mert., 

 C. Ag.) Schmitz. Part of a filament with 

 the lower parts of two trichoblasts and a 

 stichidium. Some of the tetrasporangia have 

 fallen out. The downwards directed out- 

 growths from the two pericentral cells are 

 the beginning cortical layer. 

 (About 80:1). 



monosiphonous branches reached the number of 13. The first pericen- 

 tral cell in the segment is formed under this small cell, and be- 

 comes therefore shorter than the others, of which one is fertile. 

 A single tetrasporangium is shaped in each segment; they are 

 placed in screw line and the stichidia upon the whole are beauti- 

 fully screw-formed (Fig. 307). The tetrasporangia are tetrahedri- 

 callv divided. . 



