Funaria is known as common moss or green moss or cord moss. The main plant body of Funaria is gametophyte and is of two forms.
(1) Juvenile form (creeping protonema).
(2) Adult form (leafy gametophore).
It is characterized by filamentous setae, a gibbous obtusely pyriform capsule, and usually a double peristome of 16 teeth. Clorella, Volvox and Spirulina belongs to the phylum Algae (Thallophyta).