FLORIDE& 



213 



apical cell, which divides by septa ; the 

 resulting cells do not divide further, but 

 elongate and swell somewhat at each end 

 into a bone-shaped form, producing the 

 whorled branches. From the basal cells of 

 these branches secondary branches grow 

 vertically downwards over the main axis, pro- 

 ducing the pseudo-cortex. According to 

 Sirodot, absorption takes place only in special 

 thin - walled cells ; the resting-cdls, with 

 thicker walls, often display continuity of pro- 

 toplasm. In Nemalion and Batrachospermum 

 the procarp is unicellular, and bears at its 

 apex the long thin-walled trichogyne. The 

 antherids are scattered in groups at the end 

 of peculiar ovoid cells. After fertilisation 

 the carpogone divides by longitudinal walls 

 into a multicellular glomerule enclosed in a 

 gelatinous envelope ; the terminal cells of 

 the branches of the glomerule produce the 

 spores. The cystocarps are external in the 

 axils of the branches in Chantransia and 



FIG. 190. Chantransia -virga- 

 tuln Thur. with tetrasporanges 

 ( x 100). (After Kiitzing.) 



FIG. 191. C. corymbosa Thur. 7, unicellular procarp, b, 

 with pollinoid attached. 1 1-V> stages in the branching of 

 the procarp after impregnation (x 400). VI, cystocarp 

 ( x 250). (After Thuret.) 



