I don't know what a Star plant is, so maybe that's the best thing, to decide which plant you mean, then you can google for pictures, or check on here for pictures, so here's the only plant I can think of you might mean - Trachleospermum jasminoides, commonly known as Star jasmine, an evergreen climber with white, fragrant flowers in summer.

Did you mean the Star fruit plant.....carambola?