叶柄

The development of xylem is of mesarch.Stomata are monocyclic type.

叶脉、叶、轴的维管束均为外韧型。

Petiolar modena, chief instrument 3 millimeter, without wool.

叶深 紫色,长仪3毫米,无毛。

Leaves alternate, shortly petiolate, leathery, margin entire, venation pinnate or palmately triplinerved.

叶互生，具叶短，革质，边缘全缘，脉或者掌离基三出脉的。

Trema polygama, described from Yunnan, differs in having the inflorescences shorter than the adjacent petioles.

表自云南，不同在于花序短于临近的叶。

Leaf base often narrowed into a petiole, spurless.

叶基部通常缩小成为叶，无距。

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.

地生，叶丛生，基部黑色；较年轻的叶子一复叶，较老的叶子二或三复叶。