叶柄

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

叶脉、叶柄、上胚轴的维管束均为外韧型。

Petiolar modena, chief instrument 3 millimeter, without wool.

叶柄深 紫色,长仪3毫米,无毛。

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

叶互生，具叶柄短，革质，边缘全缘，羽脉或者掌三出脉的。

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

表自云南，于花序短于临近的叶柄。

Leaf base often narrowed into a petiole, spurless.

叶部通常缩小成为叶柄，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，叶柄丛生，部黑色；较年轻的叶子一回羽复叶，较老的叶子二回或三回羽复叶。