Tasselweed (Emilia fosbergii)   move mouse over thumbnail to enlarge, click to enlarge to maximum Tedhort of Gardenweb suggests that it is a type of Hieracium (Hawkweed) Weedwoman, Remy, and SusanC (of Gardenweb) suggest Tasselweed (Emilia fosbergii) Read more about this plant on Dave's Garden