Thank you for reporting, we will resolve it shortly
Q.
Pollination in Vallisneria is by
Sexual Reproduction in Flowering Plants
Solution:
Vallisneria, is a submerged dioecious freshwater hydrophyte, i.e., the male flowers borne on male plants and female flowers are borne on female plants. Mature male flowers are abscised from the spadix and float on the surface of water. The mature female flowers also float on the water surface, but remain attached to the female plants with the help of long stalks. They have large sticky trifid stigmas. While floating, the male flowers come close to female flowers where anthers burst to release the pollens. Pollination occurs on the female flowers and are pulled down inside the water by the coiling of the flower stalks