Hyacinthus litwinowii
Hyacinthus orientalis
Hyacinthus transcaspicus

A Hyacinth is any plant of genus Hyacinthus, which are bulbous herbs formerly placed in the lily family Liliaceae but now regarded as the type genus of the separate family Hyacinthaceae. Hyacinths are native to the Mediterranean region as well as South Africa. They are named after the Hyacinth from Greek mythology.

The Dutch, or Common hyacinth of house and garden culture (H. orientalis of the northeast Mediterranean) was so popular in the 18th century that over 2,000 types were cultivated in the Netherlands, its chief commercial producer. This hyacinth has a single dense spike of fragrant flowers in shades of red, blue, white, or yellow. A variety of the common hyacinth is the less hardy and smaller blue- or white-petalled Roman hyacinth (var. albulus) of florists. Several types of brodiea , deathcamas, squill, and other plants that were formerly classified in the lily family and have flower clusters borne along the stalk also have common names with hyacinth in them.

Only three species are currently recognised within the genus Hyacinthus. They are:

• Hyacinthus litwinowii
• Garden Hyacinth, Hyacinthus orientalis
• Hyacinthus transcaspicus

Some authorities place H. litwonowii and H. transcaspicus in the related genus Hyacinthella , leaving Hyacinthus as monotypic.

The related grape hyacinths (Muscari ), sometimes called baby's-breath, are very low, mostly blue-petalled herbs similar in appearance to hyacinths and are also commonly cultivated.