Sansevieria trifasciata 'Futura Robusta' is a species of Snake Plant, aka Mother-In Law's-Tongue, characterized by its clumping, compact shape and silvery-green leaves mottled with dark green. Known as some of the toughest houseplants, they store carbon dioxide acquired at night to use during the day, then releasing oxygen at night, via photosynthesis, when their pores open. This helps it to maximize efficiency in cleansing the air, as found in a study conducted by NASA.