There are 25-30 different types of lavender; some of them are the following:

Lavandula abrotanoides, Lavandula angustifolia, Lavandula canariensis, Lavandula dentata, Lavandula lanata, Lavandula latifolia, Lavandula multifida, Lavandula pinnata, Lavandula stoechas, Lavandula viridis, Lavandula x intermedia…

The most typical types of lavender used in production of essential oil [2]:

Common lavender (Lavandula officinalis, synonyms: L. vera, L. angustifolia), Broadleaf lavender (Lavandula spica, synonym: L. latifolia), Spanish lavender (Lavandula stoechas, pronounced as /stehas/), lavandini (Lavandula x hybrida)

e.g. Lavandini from the island of Hvar Laveder is a very popular decorative plant which has been recently grown on plantations as well. It does not require specific soil quality, hence it is very economical for cultivating, and is also used as a good bee pasture.