Purple Plants! Purple Passion (Gynura aurantiaca) Tiny purple hairs on the leaf surface give the leaves a faint purple sheen. The plant also has bright purple stems, making it one of Hardy Houseplants Duo, Small Medium in Black Grant The Sill Bonsai Tree In A Decorative Tribal Ceramic Dish Birds Nest Fern Brown spots and brown edges on the leaves. This can also be caused by too much heat (sun burnt) and will only show on the area of the plant that was exposed to too much light or sun.