10 Air Purifying House Plants: Lady palm , Rhapis excelsa Bamboo palm, Chamaedorea seifrizii Rubber plant , Ficus robusta Janet Craig , Dracaena deremensis ,Janet Craig. English ivy , Hedera helix Peace lily , Spathiphyllum sp. Red-Edged Dracaena , Dracaena marginata Snake Plant , Sansevieria trifasciata Dracaena deremensis `Janet Craig' Warneck dracaena, Dracaena deremensis `Warneckii' As a side note, one of the plants NASA studied is an excellent humidifier. One six foot Areca Palm will put a quart of water into the air in a day. Dry winter air often contributes to sinus nfections and sore throats. Wouldn't it be nice to increase your home's humidity without having to fuss with a mechanical humidifier?