Botrydium, a simple siphonaceous alga with root-like attachment.
Held together by the adhesion of the cell-walls at the surface of Protosiphon and Botrydium, on the one hand, are minute vesicles contact.
Usually two cilia are present; in Botrydium and Hydrodictyon only one is present; in certain species of Cladophora four; in Dasycladus a chaplet, and in Oedogonium a ring of many cilia.
It certainly supports his view to discover, on subjecting to a careful investigation Botrydium granulatum, a siphonaceous alga whose varied forms had been described by J.
In Botrydium the chromatophores are small, without pyrenoids, and oil-drops are present; in Protosiphon the chromatophores form a net-work with pyrenoids, and the contents include starch.