Stems twining, filiform, obtaining nourishment from hosts by haustoria.

茎缠绕，丝状，获得食物从寄主以。

Leaves in a rosette, grasslike, linear, occasionally thinly filiform, often thin and transparent, fenestrate, base sheathing.

叶莲座丛生，禾草状，线，偶尔薄丝状，通常薄而透明，，基部具鞘。