These organisms have a tear-drop shape and are connected to a stalk at their wider, apical end. They form colonial, sessile euglenoids with bifurcated mucilaginous stalks. Inside their cells, numerous small, discoid chloroplasts are present. Occasionally, they produce one emergent flagellum. Reproductive cells are mobile and can attach to various surfaces, losing their flagellum and becoming attached by a mucilaginous stalk. They have the ability to form shapeless clusters of cells or dendroid colonies on a range of aquatic organisms or detritus particles.