From Wavell's A Modern Pilgrim in Mecca (1913), p. 138:
Sir Richard Burton got into hot water with many people for translating literally and without expurgation the “Arabian Nights.” A perusal of his work will give the reader an idea of how strange a medley of grave and gay, religion and superstition, high moral precepts and cynically immoral episodes is Arabic literature. The “Arabian Nights,” however, even in its most unrestrained passages, is petite bière compared with some other well-known books. One in my possession, entitled very inappropriately “Flowers of the Spring,” was written by a learned doctor of sacred law for the purpose, so he says in his introduction, of affording entertainment and distraction to his pupils when wearied by their arduous theological studies. It begins with a page or two devoted to praise of God and His Prophet—the indispensable hors d'oeuvre to an Arabic book on any subject whatsoever. A couple of stories from the "traditions," tending to prove that a joke is a good thing in its proper place, are followed by a little commentary on certain obscure passages in the Koran bearing no relation whatever to what has gone before. This is succeeded by an utterly irrelevant anecdote and some verses that would probably have been considered unduly coarse in a pothouse of Gomorrah. Before the reader has had time to recover from this outrage he is back again in some religious controversy, and so the reverend author drags his bewildered followers through four hundred and forty pages of the wildest jumble of theology, history, philosophy, eroticism, and many other subjects; the whole interlarded freely with passages from the Koran, quoted, of course, verbatim, and furnished with all the diacritical marks. Once written he evidently did not trouble to read through his manuscript, for the book abounds in repetition, and one anecdote of an unusually revolting character, which had evidently tickled him considerably, occurs no less than five times.
Is this book "Flowers of the Spring" available in a modern edition?
Casual googling did not turn up anything likely-looking.