Syngonium Wendlandii plants. As a young plant, its leaves start out heart-shaped, then gradually become arrowhead shaped as it matures. The leaves will be arrow-shaped rather than the adult lobed style. Syngonium plants are not just decorative, they have the ability to cleanse the air you, breathe and act as anti-pollutants. They also reduce airborne microbes and increase humidity. Researchers from NASA and other organizations have approved this plant as an air purifier, and it tops the list. Syngoniums absorb pollutants into their leaves, and the toxins go to the root zone where they are transformed into nutrients for the plant. Houseplants also emit water vapors that help the plant pull polluted air to the roots where the plant converts the toxins to plant food.