French beans' ancestors are native to South and Central Americas. It was not until the late 16th century that green beans were introduced to France via the Conquistadors. It would remain a low profile vegetable among common agrarians though until the 19th century, when the French made the bean a household vegetable, the name Haricot Verts ultimately branding the bean as French indefinitely. Yet, there is little difference, botanically between a French bean and a green bean, though sub varieties and improved cultivars continue to be developed. The first string-less green bean was developed in New York State by Calvin Keeney in 1894.