Allium jacquemontii Kunth. - one of my absolute favorites, from C. Asia. Slow growing, and only mature bulbs flower, but a mature clump might produce a couple dozen tight knobs of fragrant luminous pink flowers. The heads widen and at full anthesis are a nearly flat-topped or domed drumstick. Flowers in June on 18" (45 cm) stems. Photo by Mark McDonough.