 The hairs of "Bulbochaete" and the heterotrichous system "Oedocladium" are similar to Chaetophorales, with which they may share a distant relationship.Of the genus "Oedogonium" there are over 330 species, about 70 species of "Bulbochaete", and 10 species of "Oedocladium".More than half of these species are known to North America.