Eugenia Herbert writes an entertaining story of garden imperialism in Flora&rsquos Empire British Gardens in India. English gardens, along with English literature, undoubtedly propagate the colonial hangover in many Indians. They charm us with their careful profusion, their happy midpoint between the austere serenity of a Zen abstraction and the wild luxuriance of a tropical backyard. Even with their obelisks, parterres and pergolas, they order nature in such a way that we don&rsquot feel we&rsquove been ordered about.