The Salt Marsh Birds-Beak is native to the Southwestern United States and Northern Baja California. It is from the Orobanchaceae family.
The historical range of Chloropyron maritimun reached far as coastal salt marshes from northern Baja California, Mexico to Morro Bay in San Luis Obispo County, California, and inland at salt marshes near Artesia in Los Angeles County, in San Bernardino Valley in San Bernardino County, and near Oak Grove in San Diego County.
The habitat that can sustain population of Chloropyron maritimun is considered somewhat variable; ranging from freshwater seeps to on dunes or mounds, its habitat is dry in the summer and resistant to tidal influence.
Suitable coastal habitat for Chloropyron maritimum has a relatively narrow range and occurs only in high tides. Due to its idiosyncrasy, Chloropyron maritimum is restricted to salt marsh habitats that are particularly circumscribed to upper tidal marshes, making them highly responsive to hydrological fluctuations. Therefore, they are susceptible to change of salinity and duration of inundation, which are now exposed to human impacts and other environmental change. As a result, most areas of its range remain the same but there are few variations.
information/images derived from, https://www.fws.gov/carlsbad/speciesstatuslist/5yr/20090813_5yr_chmama.pdf
(page7-10)
Salt Marsh Bird's Beak 