ZYGOPTERIS 313 



axillary shoot and the normal stem of Zygopteris ; this 

 fact, which is also shown in the English specimens, 

 seems quite conclusive in favour of the cauline nature 

 of the axillary organ. 



Besides the foliage - leaves, Zygopteris possessed 

 rudimentary leaf- like organs, of small size, termed 



Fig. iiy.— Zygopteris corrugata. — Transverse section of an "Apblebia" with part of 

 the outer cortex of the leaf-base to which it belongs. The appendage contains two 

 vascular bundles. From a photograph by .Mr. L. A. Boodle. X36. Will. Coll. =64. 



scale-leaves by Renault and Stenzel, who discovered 

 them in Z. Brongniarti and Z. scandens respectively. 

 I have recently observed them in the British species, 

 Z. Grayi (Fig. 1 1 5) and Z. corrugata (Fig. i 17), and am 

 thus able to confirm the statements of the authors cited, 

 as to which I previously felt some doubt. A curious 

 feature of these appendages, which have a simple, scale- 

 like form, is that they occur on the petiole-bases as 



