Text this: Proceedings of the Xth International Symposium on Flower Bulbs and Herbaceous Perennials : Lisse, the Netherlands, April 20-24, 2008 / convener J.E. van den Ende ; [editors: J.E. van den Ende, A.T. Krikke, A.M.P. den Nijs] ; ISHS Section Ornamental Plants, ISHS Working Group on Flowerbulbs and Herbaceous Perennials.