Then she weeded her yams and cassava where they grew in the soft, dark earth and watered the pineapple plant that marked the centre of her plot.

NPR: 'Ancestor Stones:' Life and War in Sierra Leone

While from the ends of their elegant stalks pineapples nodded encouragingly, sweet potatoes and yams peeped from the earth, and great hands of bananas reached down to them.

NPR: 'Ancestor Stones:' Life and War in Sierra Leone

Turns out the hormones come from Mexican wild yams.

FORBES: Health