confluent. Indusium formed by the reflexed 
margin of the pinnule. 
Venules. Free. 
GROUP I; GENUS II; SPECIES I. 
ALLOSORUS CRISPUS. (Parsley Fern.) 
or bi-pinnate, triangular in shape. Fertile 
fronds the taller, and contracted in appear¬ 
ance. Pinnae triangular. Pinnules of fertile 
fronds stalked, and revolute at the edge ; 
those of barren fronds decurrent, wedge- 
shaped, and serrated at the edge. Rachis 
green. Stipes longer than the leafy portion 
of the frond, and brownish at the base. 
Growth. Fertile fronds erect. Barren fronds rather 
drooping. The latter resemble parsley. 
Height. Fertile fronds from six to twelve inches. 
Barren fronds from three to six inches. 
