Orchid mycorrhiza allowed for the identification of specific taxa forming symbiotic relationships which are of interest in the study, cultivation, and conservation of orchids. This is especially important in the trade and preservation endangered species or orchids of commercial value like the vanilla bean. There have been seen trends in the type of symbioses found in orchids, depending primarily on the life-style of the orchid, as the symbiosis is primarily of benefit to the plant. Terrestrial orchids have been found to commonly associate with Tulasnellaceae, however some autotrophic and non-autotrophic orchids do associate with several ectomycorrhizal fungi. Epiphytic fungi, however, may associate
Minchinhampton Common and the relationship to the Bathonian successions to the east and south. The central plateau supports a short grassland sward (due to stock grazing) with longer vegetation on the steeper slopes. The grassland includes upright brome, tor-grass, sheep's fescue, quaking grass and crested dog's-tail. Flowering herbs include common rock-rose, harebell, chalk milkwort and field scabious. The area has a significant population of orchids, including the bee orchid, fragrant orchid and frog orchid. There are more neutral grasslands and herb species in areas of landslip on the margins of the site. There are wet areas which support marshy vegetation. There are