A family of about 24 genera (Gasper et al. 2016, 2017) and about 265 species, cosmopolitan in distribution.
Ref: Cranfill (1993b) In Flora of North America Editorial Committee (1993b); Gasper et al. (2016); Gasper et al. (2017); Kramer, Chambers, & Hennipman In Kramer & Green (1990); Lellinger (1985); Li et al. (2016b); Perrie et al. (2014); PPG I (2016). Show full citations.