74 
12. Adtantum concinnum H. B. K. 
Rhizome somewhat creeping. Stipe 4-8 
inches long, black polished, naked. Frond 
F 1-14 feet long, 6-9 inches 
broad, ovate, triangular, 
2-3 pinnate ; pinnules rhom- 
boidal, 4-3 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 
ote ciate. Ramee Texture. membra- 
concinnum H.B.K, naceous. Sori kidney-shaped, 
Pinnule (nat. size): laced in hollows on the 
lobes. [Fig. 29.] 
Distribution : Tropical America from Mexico 
to West Indies, southwards to Peru and Brazil. 
Cultivated. 
13. Adiantum collistt 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. 
