pinnae

tendrils bifurcate.Leaves bipinnate, or pinnate on upper branches, basal pinnae of bipinnate leaves usually 3-foliolate;

卷须叉状，或在上部分枝状，基部状通常具3小；

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.

形态：地，柄丛，基部黑色；较年轻一状复，较老或三状复。