Snakes Heads (Fritillaria meleagris) -- my favorite bulb, a.k.a. Checkerboard Fritillaria. We grow these!
Fritillaria meleagris. Ahaa! so this is what bloomed in my garden this spring :) Its not a weed after all! good thing I didn't pull it out.
Kelly Hoernig's WORDS of ART: Checkers Anyone?
The nodding bell shaped flowers of Fritillaria meleagris are unmistakeable for their snake skin markings. This British wild flower bulb is now protected and rarely seen in its native meadows, but will always attract attention in a woodland garden, rockery, or naturalized in grass.
UK wild flowers: Fritillary (Fritillaria meleagris ) This is maybe the most exotic flower, its chequered bells look like stained glass when the light shines through them, each pale cell outlined by a darker frame. The reason fritillaries are now so rare is that, as bulbs, they can be destroyed by just one ploughing of a site where they may have been for centuries. Photograph: Jonathan Buckley
fritillaria meleagris - fairy umbrellas. (AKA "snake's head frittallary" in the uK) - the link is to a site outside US, but they will grow in US zones 4-8