Capsule valves longitudinally vittate to abaxially vittate with lateral vesicles.

蒴果纵向裂片具油道到背面具油道具侧小泡。

Capsule linear, 2.5-4 cm, longitudinally costate.

蒴果线形，2.5-4厘米，纵向具中脉。

The drug is collected in summer and autumn when the fruit turns greenish-yellow, boiled in water until the exocarp becomes grayish-white in colour, halved longitudinally, and dried in the sunn.

夏、秋二季果实绿黄时采收，置沸水中烫至外皮灰白色，对半纵剖，晒干。