CALYCULARIA RADICULOSA CAMPBELL 



47 



sometimes even of three layers of cells. In this respect Calycularia radiculosa 

 perhaps more nearly resembles Makinoa than it does Pallavicinia. 



A characteristic feature of the thallus is the presence in the older por- 

 tions of an endophytic fungus or mycorrhiza, very much like that found 

 in the subterranean prothallia of various pteridophytes. A similar mycor- 

 rhiza, however, has been found also by the writer in various green fern pro- 

 thallia, and it is also known to occur in various other liverworts. 



The fungus both in its structure and manner of growth resembles more 

 closely the mycorrhiza described by the writer 5 in Ophioglossaceae. As in 

 the Ophioglossaceae there were occasionally found oogonium-like enlarge- 

 ments (Fig. 3, D) which may have been perhaps special reproductive bodies, 

 but this could not be positively demonstrated. The genus Calycularia is 



Fig. 5. A, upper surface of a male plant, x, apex of the thallus. A^, under 

 surface, showing the antheridia, $ , surrounded by the laciniate scales, sc. x 15. 



B, median section of the thallus, showing the apex, x, and the antheridia, $ , x 40. 



C, a horizontal section of the antheridial receptacle, sc, scales. D, scales showing 

 the laciniate margins. 



5 Campbell, D. H. 

 Washington. 1911. 



The Eusporangiatse. Pub. 140. Carnegie Institution of 



