Jersey the island. The species is the subject of an ongoing programme to save it from extinction in Jersey via a collaboration between States of Jersey, Durrell Wildlife Conservation Trust and Jersey Amphibian and Reptile Group (JARG), with support and sponsorship from several other organisations. The programme includes captive breeding and release, public awareness and habitat restoration activities. Trees generally considered native are the alder ("Alnus glutinosa"), silver birch ("Betula pendula"), sweet chestnut ("Castanea sativa"), hazel ("Corylus avellana"), hawthorn ("Crataegus monogyna"), beech ("Fagus sylvatica"), ash ("Fraxinus excelsior"), aspen ("Populus tremula"), wild cherry ("Prunus avium"), blackthorn ("Prunus spinosa"), holm oak ("Quercus ilex"),
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