bipinnate

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

卷须二叉二回羽叶，或在上部分枝羽，基部二回羽叶通常具3小叶；

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：地生，叶柄丛生，基部黑色；较年轻叶一回羽复叶，较老叶二回或三回羽复叶。