Ciaran Bradshaw, a horticulturist from Cambridge Botanic Garden in England, uses a brush to pollinate a rare Victoria cruziana lily. /VCG Photo

The Victoria cruziana lily is a tropical species of flowering plant. It is gender-fluid and has to be hand pollinated to encourage its reproduction. /VCG Photo

The plant has large leaves that can reach up to two meters wide, and is strong enough to hold small children. /VCG Photo