Jim, I looked up the monograph on Alliums of Dilys Davis. He states that A neopolitanum is the valid name and that A. cowanii is an invalid synonym. The form known here known as A cowanii should probably be considered as a form or selection of A. neopolitaum. It is widely used here in the cut flower industry, because it has long rigid upright stem with a good size umbel of larger flowers, while A neopalitanum has often bend or even rampant flower stems. Greeting Lauw de Jager http://www.bulbargence.com/ South of France (zone 8 Olivier) > I've read that much, maybe all, of the material commonly sold as Allium > neapolitanum is in fact A. subhirsutum or other species. > Here in zone 7, I've had trouble keeping stock received under the names A. > cowanii and A. neapolitanum.