| The two adaxial sepals are formed in succession, and the two abaxial petals become visible. |
| This drying technique involves the use of an absorbent which desiccates the rose by transferring the moisture from the petals to another medium. |
| In several species the flowers never close, as the petals abscise when the flower is still open. |
| For example, petals may wilt and abscise more rapidly after pollen deposition on the stigma or pollen tube growth through the style. |
| The four petals, with the stamens inside, form the quadrangular nail-like head of the clove. |
| In the present experiments, flower closure was not observed in any of the families in which petals abscise. |
