Hank over at Hunter Angler Gardener Cook (one of my new favorite blogs) recently rattled off a long list of edibles growing in his lawn.
Many of these species are ubiquitous Old World weeds that followed the Europeans here. Hank lists some of the highlights and describes the weather that produces the best tasting harvest (with environment affecting plant metabolism and all...)
Since reacquainting myself with Eastern wildflowers this past spring, I've kept a running mental tab of native and/or edible herbs that I'll be overseeding my glyphosated lawn someday. I'm glad to see that I can now put an "edible" checklists next to violets and vetch. Why anyone would want a solid green lawn over a seasonal gradient of yellows, whites and purples, I'll never understand...
Just make sure you know what you're eating.*
*Incidentally, does anyone know if there's any risk of picking up parasites eating from the same salad bowl that your local critters roll around in?