346 



Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



I 



Fig. 341. Delesseria tenuifolia Harv. 



a, transverse section of older leaf, b, summit of a leaf, c, a young leaf. 



d, middle part ot the leaf of tetrasporic plant. 



(a, about 45:1. b, 270:1. c, 25U:1. d, 120:1). 



A, 

 of 



Fig. 342. Delesseria tenuifolia Harv. 

 part of the leaf of an antheridial plant (120:1). B, transverse section 

 antheridial stand (270:1). C, transverse section of the midrib of the 



leaf (120:1). 



I 



