65 
4. Adiantum trapeztforme L. 
Rhizome short, creeping. Stipe scaly at the 
very base, otherwise black, polished, naked- 
FIG. 22.—Adiantumns trapeziforme L. 
Pinnule (nat. size). 
Frond up to 4 feet high, 3-2 pinnate, central 
pinna the largest, ultimate pinnules 14-2 inches 
long, 4-% inch broad, ovate-rhomboidal or 
trapezoid, long-pointed with the upper and outer 
edge bluntly lobed ; rachis and surfaces naked. 
Texture papery, herbaceous. Sori on the upper 
and outer edge large, oblong. ([Fig. 22.] 
_ Distribution: West Indian Islands, Jamaica, 
Cuba, Mexico, Central America, Caraccas, 
Brazil, Vera Cruz and Guatamala. 
Very commonly cultivated. 
5. Adtantum formosum R. Br. 
Stipe black, glossy, rough, 12-18 inches long. 
Frond 14-2 feet long, about two-thirds broad, 
5 
