400 



FILICALES 



[CH. 



The fronds of this species reached a length of more than 

 3 metres and a breadth of 2 metres. They are characterised 

 by the presence of aphlebiae^ appressed to the rachis and by 

 circular sori composed of a small number (3 — 6) of sporangia. 



I I K 



FiQ. 291. A, B. Ptychocarpus unita. 



C, D. Asterotheca Sternhergii. 



E. Danaeites sarepontanus. 



F. Hawlea Miltoni. 



G. Hawlea pulcherrima. 



H — K. Scolecopteris elegans. 

 (A, B, after Renault; C— G, after Stur; H, I, after Strasburger; 

 K, after Sterzel.) 



In habit and in the form of the pinnules this type is similar to 

 Dactylotheca plumosa. 



Haiulea. 

 Stnr^ retains this generic name for sori in which the 

 ' See Chap, xxvii. 2 Stur (85) A. p. 106. 



