Trichocyte (algae) explained

Trichocyte in algae are cells which grow on the outside of the thallus, from which hairs grow.^[1] In algae, trichocytes grow principally over the summer; their growth is mediated by water temperature and day length.

Notes and References

1. H.W. Johansen. Coralline Algae: A First Synthesis. Google books https://books.google.com/books?id=s0paDwAAQBAJ&dq=trichocyte+algae&pg=PP52