Maranta

Maranta leuconeura 

The prayer plant is one of the most distinguishable tropical foliage houseplants, thanks to its beautiful decorative leaves. The popular tricolor variety has deep green, velvety leaves with yellow splotches down the midrib and arching red veins traveling to the leaf margins. Maranta leuconeura, also known as prayer plant, is so named the plant's leaves lay flat during the day, but fold up like praying hands at night.