Stems winged. Leaves large, thick, palmately veined, base broadly cuneate, margin entire or coarsely serrate above middle. Calyx broadly campanulate, apex suboblique.

• 茎具翅。大的叶，厚，掌状脉，基部宽楔形，边缘全缘或有粗锯齿的在中部以上。花萼宽钟状，先端。