Fanny Perronet was dead. Hugh's wife, Fanny, dies after 40 years of marriage; his former lover, Emma, appears at the funeral. Hugh becomes wild to win her love again, while neighbor Mildred (with her gay husband Humphrey's blessing) has designs on Hugh. Hugh's son Randall, meanwhile, is madly in love with Emma's companion/secretary Lindsey who may or may not be having an affair with her employer while Randall's wife Ann yearns for Mildred's brother Felix, who, in turn, has always secretly adored her. But it is the scheming of Miranda, Randall and Ann's teenaged daughter, that ultimately determines the outcomes of their lives, for better and for worse.
The title, derived from Rupert Brooke's poem "The Old Vicarage, Grantchester", refers on a literal level to the fact that Randall and Ann run a successful rose-growing business. There is, however, more to it than that. There always is with roses in English literature. A rose has a symbolic meaning: it can be a symbol of love, of truth, of beauty, of transience, of Englishness. By an "unofficial" rose meant a wild rose of the hedgerows which he contrasts with the "official" cultivated flowers of the Berlin garden in which he is sitting, demonstrating his preference for the natural over the artificial. In the context of Murdoch's novel, Brooke's unofficial rose becomes a complex symbol. All the five elements mentioned above play a part in the book. All the major characters, who are linked by an intricate network of inter-relationships, are in search of love, and some of them are in search of truth and beauty as well. Hugh, for example, is an art connoisseur, and Randall's one obsession, apart from his love for Lindsay, has been his quest to breed the perfect rose. The element of transience is also emphasised; several of the characters (Hugh, Emma, Mildred) are elderly, and are confronted with what may be their last chance of achieving love and happiness.
The book was written in the early sixties, and Murdoch probably deals with sexual matters less frankly than a modern writer would. She implies that there may be a lesbian relationship between Emma and Lindsay, although this is never made explicit. She is, however, more explicit about Humphrey's homosexuality- the reason why his marriage to Mildred is a hollow one- even though male homosexuality was still illegal at the time she was writing. Unlike some sixties writers, however, Murdoch was less concerned with sexual relationships than with emotional states of mind, and her skill in conveying these is masterly. "An Unofficial Rose" well demonstrates why she is regarded as one of the leading British novelists of the late twentieth century.