That's a peace lilly. I have a couple of them in my house. My big one only flowers just one at a time. This one is quite impressive. Mine are in pots.
38 Gallon angelfish, rasboras, bumblebee catfish
20 Gallon hexagon black skirt tetras, neon tetras, ghost shrimp, chinese algae eater
10 Gallon planted betta, platies, cory cats, snails, amano shrimp
25 Gallon planted guppies, black neon tetras, otos
55 Gallon bala sharks, rosy barbs, platies, yoyo loaches, pearl gourami, plecos
72 Gallon bowfront goldfish, pleco