American Species of Alarchantia. 



303 



/. ^A shows a plant with numerous cupules and female recep- 

 tacles, while /. jC shows a small forking fragment with cupules 



Fig. 18. Marchantia chenopoda 



Appendages of ventral scales, x 100. A-C. Peru, Cook & Gilbert 755. 

 D-F. Bolivia, A. d'Orbigny, type of M. peruviana. G, H. Bolivia, H. H. 

 Rusby 3004. I, J. Bolivia, P. Jay 71. 



only. The receptacles are so strongly convex that they appear 

 conical and resemble those of Conocephalum conicum (L.) 

 Dumort. In fact, according to Lehmann and Lindenberg, the 



