Cultivars in the following 54 genera have been listed and checked for their presence in plant collections of national importance in Britain and Ireland. All contain one or more threatened cultivars, whether vulnerable in cultivation (present at three or more sites), endangered in cultivation (growing at only one or two sites), or critical in cultivation (not found alive anywhere).
53 National Collection Holders exist for 32 of these genera. Collection Holders will be contacted first, then other experts are sought. Please contact me if you are an expert on cultivars in one or more of these genera, or can recommend someone who is.
Guidelines for expert assessment (PDF 134kb)
Guidelines for expert assessment (MS Word 109kb)
Genera ready for expert assessment
Acanthus, Acca, Actinidia, Amelanchier, Antirrhinum, Aucuba, Blechnum, Brachyglottis, Brugmansia, Callistemon, Calluna, Campsis, Canna, Cardamine, Cassiope, Chionodoxa, Cornus, Cotinus, Crocus, Dichondra, Dierama, Digitalis, Diospyros, Echium, Epilobium, Epimedium, Eranthis, Erica, Erodium, Erysimum, Eucalyptus, Euphorbia, Fatsia, Festuca, Ficus, Forsythia, Fothergilla, Fragaria, Fremontodendron, Geum, Ginkgo, Griselinia, Gunnera, Helianthemum, Heliotropium, Hepatica, Hyacinthus, Hyssopus, Iberis, Iresine, Juglans, Kalanchoe, Kalmia, Lavandula
Last updated 03/01/12