Romneya coulteri, known commonly as Matilija poppy, is a perennial from the poppy family native to southern California and Baja California where it occurs in dry regions, often hosting chaparral plant communities. It is fairly common in cultivation especially where water conservation is a concern and is known to spread aggressively via its rhizomatous roots if treated well. The white and yellow flowers are the largest of any plant native to California and was in contention to be the state flower though it was beaten out by its not-too-distant relative, the California poppy. The fruit employs similar structures to many others in Papaveraceae (if you check my earlier post of Argemone glauca you’ll see great similarity!) but has more chambers than most, making it look like a crown. Each pod bears copious, small, classically poppyesque seeds. If you look closely you can see tiny fractures form in the capsule such that even gentle bumping or shaking can break it to pieces, spilling more of the seed that hasn’t already fallen out the top when shaken in a breeze.
