My wife and I had always puzzled over this line, and when we were lucky enough to take a holiday over twenty years ago in Kashmir (it was safe to go then - it's such a tragedy what's happened since) we thought we might have the opportunity to find out a definitive answer. Dal Lake in those days was frequented by exotically-named travelling salesmen (the tailor, for instance, was "Mr. Saville Row")who used to sail by and call at our rented houseboat with various wares. One was a flower and plant seller, called "Mr. Wonderful", and my wife asked him whether he had anything on his boat called "Beauty of Kashmir". After a fleeting look of complete bafflement he quickly recovered his poise and, nodding and grinning excitedly, explained that - yes - he had exactly what we were looking for. We treasured the small bulbs like rare birds' eggs for the rest of the holiday and during the homeward journey, planted them reverently in our garden and awiatied developments. They turned out to be grape hyacinths. Ah well. A fond memory, if perhaps unhelpful to this thread.