Limnanthaceae is a small family restricted to North America. It traditionally counted two genera, Floerkea Willd. and Limnanthes R. Brown, and this seems to be confirmed by molecular data (Meyers & al. 2010). For some time it was believed to be part of the Geraniaceae family.
One of the genera, Limnanthes, is of some importance horticulturally.
Meyers S.C. (2010) Evolutionary Relationships and an Investigation of Sympatric Speciation within Limnanthaceae. PhD dissertation, Oregon State University [available online at: http://ir.library.oregonstate.edu/xmlui/bitstream/handle/1957/16166/Stephen_Meyers_PhDthesis.pdf?sequence=1]
Meyers S.C., Liston A. & Meinke R. (2010) A Molecular Phylogeny of Limnanthes (Limnanthaceae) and Investigation of an Anomalous Limnanthes Population from California, U. S. A. Systematic Botany 35(3): 552-558.
Ornduff R. (1971) Systematic studies of Limnanthaceae. Madroño 21: 103-111.
Plotkin M.S. (1998) Phylogeny and Biogeography of Limnanthaceae. M.S. thesis. University of California, Davis.