Dracunculus vulgaris, commonly known as the voodoo lily or dragon arum, is an impressive plant that produces one massive purple bloom with a black spadix -- a nonshowy flowering stalk that is held within a large colorful leaf. Although D. vulgaris creates a show-stopping display, don't plant it too close to windows or passersby because it emits a smell akin to rotting fish when in bloom. However, this beauty is easy to grow, and if you can stand the smell, it provides an impressive focal point in your landscaping. D. vulgaris thrives at temperatures between 50 and 75 degrees Fahrenheit.