For tropical beauty, look no further than Siam Tulip. Its magnificent, upright flowers and handsome green foliage make a gorgeous house plant.Cupped petals and tall tulip-like leaves lend the common name, but it's also sometimes called Java Tulip and Hidden Ginger.A member of the Zingiberaceae (Ginger) family, this ornamental belongs to a diverse group, including edible plants. Siam Tulip is purely decorative. In fact, it is poisonous to cats and dogs. The good news is, if you grow it on your patio, deer won't touch it.