Stamens coherent in pairs, anther thecae not confluent; leaf blade margin serrate, at least near apex; lateral veins 3-5 on each side of midrib; bract and sepal margin entire.

• 雄蕊连着成对，花药不汇合；叶片边缘有锯齿，至少近先端；侧脉3-5在中脉每边各；苞片和萼片边缘全缘。(4