While walking in a public garden in the UK Midlands, I came across some pretty, tulip-like foliage (but larger than that of most tulips). From the center there were some dried flower-stalks, with seedpods and seeds as pictured below.
It is strange that inside the seedpods, there is a yellow sphere and what looks like some yellow small seeds. Can anyone identify the (general species) of the plant in question?
Edit 1: Here is a size comparison photo, with one quarter, 10p, one euro, one real, one lev, and one AAA battery. Also featuring the larger green seedpod.