Cuscuta cephalanthi Engelm.
Family: Convolvulaceae
buttonbush dodder
[Grammica cephalanthi (Engelm.) Hadac & Chrtek]
Cuscuta cephalanthi image
from USDA Plants website  
Etymology: Cuscuta: a name of Arabic derivation meaning "dodder"
Plants: parasitic annual/perennial herbaceous vine
Flowers: 5-parted, stalked, each flower with 1 to several bracts below; inflorescence an open, branched cluster
Fruits: rounded, 4 seeds
Conservation Status: Native