Peace lily indoor house plant. With a relaxed name like peace lily, spathiphyllum is an easy-care, low-light, tropical houseplant, popular for its tall white calla-like flower spikes. It also filters indoor air and removes many airborne toxins, including formaldehyde and ammonia. Tolerates very low light levels, although, without some brightness from a window or a lamp, the plant is likely to inconsistently bloom. Long-lasting flower stalks are borne in spring and hover gracefully over the foliage. With the striking contrast of the dark green foliage and creamy white flowers held on stiff stems, it looks attractive in all types of homes and design schemes. A well-grown peace lily can bloom twice a year, resulting in several months of flower display.