From Caught By The River, which is new to me:

Seasons have become increasingly meaningless. Weather patterns within very localised habitats are the key to mushroom knowledge, and the resulting forest-craft is no different to water-craft. I learned this one season in The Morvan, for the mushroom is as shy as any dace, refusing to enter the atmoshphere of a sad, imperfect world. A careless environment is like a bad angler, a clumsy litter-lout who spooks his quarry. The shy mushroom demands pre-set conditions, is inflexible and will not adapt to a kinked environment. A mushroom thrives strictly on its own terms, in its unique conditions. It is ultra consistent and truly wild. (more)

(thanks to jon savage)