It is in agreement with the treatment that 4 genera could be divided in the genus Ixeris in Fl.

• (2)黄瓜菜型：上表皮无气孔器，下表皮气孔器为不规则型，偶有非典型不等型，上、下表皮细胞为不规则形，垂周壁深波状；