Dead nettle Lamium purpureum
Along 19th St. by the Fairgrounds. El Dorado. April
Common vetch Vicia sativa
Along 19th St. by the Fairgrounds. El Dorado. April
Pinkweed, Pennsylvania Smartweed Polygonum pensylvanicum
Along AR Rt 9, south of Malvern. October
Tulip Magnolia Magnolia lilliflora
Garvan Woodlands Gardens, Hot Springs. March.
This is probably not a native tree, but you do see a number of them in Arkansas, many with a lot more flowers than this one.