Petals lanceolate, flat, 6-8 mm, membranaceous, glabrous, white. 花瓣披针形，平的，6-8毫米，膜质，无毛，白色。
Exotesta is stone-hard, mesotesta coriaceous, endotesta membranaceous. 外种皮石质，中种皮革质，内种皮膜质；
Free-radicals mostly destroy membranaceous structures of cell and organelle. 自由基主要破坏细胞及细胞器的膜性结构。
The white membranaceous objects appear on the verruca and the dubious infected skin round after using the product,than getting smaller and dropping out with the rebom skin. （2） 使用本品后疣体及四周散在的肉眼不易察觉的萌芽状态疣体会出现白色膜状物，进而逐渐萎缩，并伴随着新生皮肤的再生而脱落。
