I talk a lot about the care and cultivation of the incomparable orchid here, but even among this amazing and diverse family of plants, vandas are in a class by themselves.  Possessing a notably tall and stunning spray of flowers, vandas are also known for having a long-lasting flower that blooms in a rainbow of rare and vibrant colors, often accompanied by a sweet-smelling fragrance.  All of these unique characteristics certainly earn vanda its place as a pre-eminent symbol of exotic, tropical beauty the world over.  Let's take a closer look at how vanda's particular attributes, which include its love for heat, ventilation and humidity, also make epiphytic vanda the…