Dendrobium Sonia is a dendrobium hybrid variety, falls in the dendrobium-Phalaenopsis catagory, It has lovely fresh bright purple - white flowers. Very attractive. This variety is used for cut flowers. This is the first flower that comes to everybody's mind when referred to an orchid. is a dendrobium hybrid variety, falls in the dendrobium-Phalaenopsis catagory, It has lovely fresh bright purple - white flowers. Very attractive. This variety is used for cut flowers. This is the first flower that comes to everybody's mind when referred to an orchid.