To compensate for losses a large number of flowers are needed on the same plant, but these are often cross-pollinated and geitonogamy is common. Orchids that have food-rewards attract a greater variety of visitors, but these include non-pollinating or pollinia-robbing insects. Initial observations indicated different aspects to orchid-insect relationships and this deserved more attention. The nectar-rewarding orchid pollinators received only basic treatment and are elaborated on in this companion volume. The terrestrial orchids of Victoria are reputed to attract pollinators by deception and the highly specialised strategies used were well covered in Orchid Pollinators of Victoria, 4th edition.
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