74 



12. Adiantum concinnum H. B. K. 



Rhizome somewhat creeping. Stipe 4-8 

 inches long, black polished, naked. Frond 

 i-ij feet long, 6-9 inches 

 broad, ovate, triangular, 

 2-3 pinnate ; pinnules rhom- 

 boidal, J-f inch across, 

 obliquely wedge-shaped at 

 the base, outer edge more 

 or less rounded and lobed 

 with the lobes entire, crenate 

 or blunt ; rachis and surface 

 naked. Texture membra- 

 naceous. Sori kidney-shaped, 

 placed in hollows on the 

 lobes. [Fig. 29.] 



Distribution : Tropical America from Mexico 

 to West Indies, southwards to Peru and Brazil. 

 Cultivated. 



FIG. 29. Adiantum 

 concinnum H. B K. 

 Pinnule (nat. size). 



13. Adiantum collisii Moore 



Stipe and rachis black, polished, naked. 

 Frond about as long as broad, at least four- 

 pinnate ; pinnules up to ^-inch broad, wedge- 

 shaped at the base, outer edge rounded and 

 deeply lobed with the lobes finely serrate. 



