Blackthorn - Prunus spinosa Other names: Sloe Family: Rosaceae Flower Colour: white, Bloom in: March, April, May, Type of flowering: number of petals 5, Prunus spinosa - blackthorn Prunus spinosa (blackthorn, or sloe) is a species of Prunus native to Europe, western Asia, and locally in northwest Africa. It is also locally naturalised in New Zealand…