Corona distinctly cupular or cylindric, usually obviously membranous, sometimes plicate, tube as long as or longer than gynostegium and/or much longer than marginal lobes.

• 清楚的副花冠杯状或圆筒状，通常明显膜质，有时折扇状，筒部等长或长于合蕊冠和远长于边缘的裂片。(52