Found in nearly every climatic condition in the world and consisting of some 25,000 to 30,000 species, orchids are one of the largest groups of flowering plants.
Brian Rittershausen has been writing and lecturing for many years and is an active member of the Royal Horticultural Society's Orchid Committee.Sara Rittershausen is the proprietor of Burnham Nurseries in Devon and writes for the National Orchid Journal and many other publications.Location: Devon, UK