Common Groundsel, Old-man-in-the-Spring

(Senecio vulgaris) On left 3/31/12 D&M MD and on right 4/5/12 PL DE
More or less hairy; black tips on bracts; 69 spp of Senecio (pronounced See-NEE-see-oh)
http://plants.usda.gov/java/largeImage?imageID=sevu_002_ahp.jpg
http://www.ipm.ucdavis.edu/PMG/WEEDS/common_groundsel.html