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 hortulana Prunus hortulana Prunus hortulana, called the hortulan plum and wild goose plum, is a fruit shrub in the rose family found in the central United States in: Arkansas, Iowa, Illinois, Indiana, Kansas, Kentucky, Massachusetts, Maryland, Missouri, Nebraska, Ohio, Oklahoma, Tennessee, Texas, Virginia, West Virginia. Populations east of the Appalachians probably represent naturalizations. "Prunus hortulana" is a deciduous tree with a trunk diameter of up to and an overall height of or more. Leaves are green and hairless on the top but hairy on the underside. White flowers in clusters of 2-4 appear in the Spring. Fruits are red or yellow