Maranta (Prayer Plant) 'Red' Evergreen Nursery Beaucarnea recurvata 'Ponytail Palm' Snakeroot Botanicals Rubber Plant Lower Leaves Dying House Plant Journal Cactus Opuntia 'Prickly Pear' Tropical Giant Spider Lily Buchanan's Native Plants NASA has classified Sansevieria, now called Dracaena, as an air purifier due to its ability to remove toxic compounds such as benzene, formaldehyde, trichloroethylene, xylene and toluene.