Dodder
Cuscata sp.
Dodder is most noticeable as a yellowish (because it lacks chlorophyll) mass of parasitic threads growing over its host plants. These were seen along US 82 just west of Urbana Road.
May

Unknown yellow flower. Looks like some sort of pea or bean.
This was growing along AR Rt 9, south of Malvern. October

Gum Plant
Grindelia lanceolata
Along Baxter County Rt 168 west of Clarkridge. September