This section is from the book "The Gardener V1", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
It is unnecessary to mention the varieties of II. orientalis, which are so universally grown in pots and bedded out in the flower-garden; but this paper would be incomplete without a notice of H. amethystinus, which is a totally different type of Hyacinth to the beautiful forms alluded to. As the name denotes, the flowers are amethyst blue, in loose open spikes, more like some of the varieties of Scilla nutans, the Wood Hyacinth, than the more erect close-spiked II. orientalis. It flowers towards the middle or end of April.