200 maxon: a new anemia from Mexico 



Ane7nia makrinii belongs to the small group of species with distichous 

 simply pinnate fronds with the basal pinnae fertile, of which A. speciosa 

 Presl and A. mexicana Klotzsch are the only North American repre- 

 sentatives. It resembles A. speciosa somewhat in its short fertile 

 pinnae, but differs widely in its more numerous and narrower sterile 

 pinnae, its thin-herbaceous (not rigidly coriaceous) leaf tissue, and in its 

 prominulous veins, the veins of A. speciosa being distinctly impressed 

 upon the upper surface. In the character of its leaf tissue it is near A. 

 mexicana, but that species is characterized by having the pinnae sub- 

 cordate-truncate at the base, or exciso-cuneate below, the veins fibril- 

 lose-hirtous beneath, and the fertile pinnae erect and invariably sur- 

 passing the sterile lamina of the fertile frond. Anemia makrinii differs 

 noticeably from both in the flat, nearly straight teeth and only faintly 

 cartilaginous margins of the sterile pinnae, the margins in the two re- 

 lated species being strongly cartilaginous and the teeth stoutish, very 

 rigid, often concave, and curved or, in A. speciosa, commonly hamate. 



The somewhat iridescent appearance of the upper surface of some 

 of the sterile blades is an interesting character but one probably not of 

 specific importance, as it is variable and tends to disappear. When 

 present it gives the frond a singularly attractive aspect. 



