tripinnatifid

tree ferns of temperate Australasia having bipinnatifid or tripinnatifid fronds and usually marginal sori; in some classification systems placed in family Cyatheaceae.

分布于温带澳大拉西亚树蕨，二回羽状分裂或三回羽状分裂，囊位于边缘；在一些分类中归入桫椤科。

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，柄丛生，基部黑色；较年子一回羽状复，较老子二回或三回羽状复。