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

茎缠，，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，禾草，线形，偶尔，通常明，，基部具鞘。