I have this attractive little wildflower growing through my yard, and I would like the identification. They get from 6"-20" tall and very slender. Before blooming, the flower buds are curled downwards.It blooms from early April until summer. 
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I would say it is an oxeye daisy, if those petals were not so narrow… – Jacek Konieczny Apr 30 '12 at 7:25
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It's a daisy fleabane, Erigeron sp.. My best guess is Robin's plantain, E. pulchellus, at least if you live in eastern North America. It's native there, and a very common "weed" of semi-disturbed areas, but it also is common in moist-ish open to moderately closed woods.
