I have a parlor palm that has a white substance growing around the base of the plant. I keep these plants potted outdoors on my
patio. It looks like white powder.
Certified GKH Gardening Expert
This actually looks like two plants. A Syngonium plant, and Tradascantia (Some countries call it Rhoeo) plant. Both of these have VERY different care than Parlor Palms. It looks like a harmless soil fungus, as many plants have beneficial relationships with fungi.
I will include two articles that will help you to care for both of the plants: https://www.gardeningknowhow.com/houseplants/arrowhead-plant/arrowhead-plant-care-arrowhead-plant-or-syngonium-podophyllum.htm