二回羽状的

1.Characteristics: Terrestrial ferns; stipes tuft, backlish at base; young fronds pinnaye with wider pinnae, when getting older, the fronds become bipinnate or tripinnatifid with slender pinnules.

地，叶柄丛，黑色；较年轻的叶子一回状复叶，较老的叶子二回或三回状复叶。