Ash (Lat. Fraxinus) is a genus of trees of the family Oleaceae.
Genus comprises 63 species in Europe, Asia, North America and North Africa. In Croatia, there are native narrow-leafed ash in flood lowlands, mountain ash in the mountains, and mana ash in submediterranean.
The leaves are odd pinnately compound. The wood is hard and is used for making furniture, boats, musical instruments, for firewood, etc.
The flowers are dioecious, or single-sex and unicameral, assembled in the compound pies. Inflorescences are usually composed of four petals, at some species of two or none. The fruit is a nut.
Pollination is by insects (eg.Mana ash) or wind (eg. narrow-leafed ash, mountain ash, etc.).