bindweed vs black-eyed pea

black bindweed (Fallopia convolvulus). 

true bindweed (Convolvulus). 

slender bindweed (Polymeria calycina). 

bittersweet nightshade, blue bindweed (Solanum dulcamara). 

false bindweed (Calystegia). 

Any pale bean with a black spot. 

An African leguminous plant, of the species Vigna unguiculata, widely cultivated as food and forage, specifically Vigna unguiculata subsp. unguiculata. 

The edible seed of these plants.