THE mention of the word "maze" most frequently calls to mind a block of tall shrubs penetrated by a puzzling branching path, which terminates in an arbour or goal of some sort. But just as we have seen that the horticultural maze is far from being the sole form of expression of the idea, so we must now recognise that even in horticulture the well-known hedge maze is not the only type of verdant labyrinth. The dwarf box, although a favourite material for de-limiting flower beds and edging paths…