Romneya /ˈrɒmniːə/ is a genus of flowering plants belonging to the poppy family (Papaveraceae). There are two species in genus Romneya, which was named for Irish astronomer John Thomas Romney Robinson. They are known commonly as Matilija poppies (/məˈtɪlᵻhɑː/ mə-TIL-i-hah) or tree poppies and are native to southern California and northern Mexico. The two species are: \n* Romneya coulteri Harv. – Coulter's Matilija poppy \n* Romneya trichocalyx Eastw. – Bristly Matilija poppy. Some consider this a variety of Romneya coulteri, but it is accepted in recent manuals.