Trichomes in this group can either exist individually or create fine mats. These trichomes are typically straight or curved, although less commonly, they may exhibit a wavy pattern. They are often quite short and consist of a small number of cells, although in rare cases, they can be long and comprise many cells. Typically, they are noticeably constricted at the crosswalls. They lack firm sheaths but may have wide, diffuse mucilaginous envelopes. These organisms are immotile but can occasionally exhibit slow gliding movement.The cells are mostly cylindrical with rounded ends, or sometimes they are nearly barrel-shaped. They are almost always longer than they are wide, although occasionally, they may approach an almost isodiametric shape.Apical cells are cylindrical with rounded ends. Some species may possess one or two polar aerotopes located near the crosswalls, though these may eventually be categorized into a separate genus.