When we hear jasmine plants we think about the plants that produce white fragrant flowers and there are over 200 varieties of species of them. They are decorative, ornamental plants that can bring fragrance and beauty to your garden. The flowers are white, fragrant and small in most cases.
However, the orange jasmine flowers are non fragrant, but small and decorative flowers that can add beauty to your colorful tropical gardens and they are very different from the real jasmine flowers. They are different species of plants with different flowers - although the name is similar probably due to some similarity in appearance.
Note that there is also a real jasmine variety which is known as orange jasmine - but they have off white or white flowers. So the Orange jessamine or orange jasmine flowers from Cestrum aurantiacum is altogether a different kind of plant that resembles the real jasmine flowers but they look colorful unlike the real jasmine.
The beauty of the flowers and the colorful nature make them great ornamental plants. When they start flowering, they give bunches of colorful jasmine like flowers so there is no doubt they look great in gardens. However the downside of planting them in your garden is that they can be invasive and they are also known to be very toxic to livestock.