Prunus spinosa of the fruit caused by the fungus "Taphrina pruni" produces an elongated and flattened gall, devoid of a stone. The shrub, with its savage thorns, is traditionally used in Britain and other parts of northern Europe to make a "cattle-proof" hedge. The fruit is similar to a small damson or plum, suitable for preserves, but rather and for eating, unless it is picked after the first few days of autumn frost. This effect can be reproduced by freezing harvested sloes. The juice is used in the manufacture of fake port wine, and used as an to impart roughness to genuine
Prunus × pugetensis The chief difference from its parents is that its flowers almost always abort, and it rarely bears any fruit. Prunus × pugetensis Prunus × pugetensis is a hybrid species of cherry discovered growing in the Pacific Northwest region of North America. It has been given the nominal common name Puget Sound cherry. It is a cross of introduced sweet cherry, "Prunus avium", and native Oregon cherry, "Prunus emarginata". Individuals have been found growing in British Columbia, Washington state and Oregon, in the natural range of "P. emarginata". It differs from "P. avium" in a number of features, including having narrower