صورة Cystoseira osmundacea

الوصف:

This is a female reproductive frond of the kelp floating on the surface and phot.ographed in August. It shows the meiotically produced developing eggs. When these are released and fuse with sperm from a male plant another diploid thallus results. The alga's holdfast is anchored to the sea floor. This life cycle contrasts with that of most kelps in which the diploid thallus alternates with a microscopic haploid sexual phase.