A collection of Trillium spp. & natural hybrids at Royal Botanic Garden Edinburgh (RBGE) has been awarded National Plant Collection status. A collecting trip to the USA in 2011 increased the Collection significantly. Some of the species are original collections by Alfred Evans (assistant curator RBGE 1939-1985).
The collection of Rhododendron hybrids bred at Bodnant Garden 1927-1983 is Bodnant Gardens' fifth National Plant Collection and second Collection of Rhododendron. The garden is celebrated for its link to the plant hunters of the early 1900s whose expeditions formed the base of the garden's five National Plant Collections - Magnolia, Embothrium, Eucryphia, Rhododendron forrestii and now its latest collection of Rhododendron hybrids bred at Bodnant Garden 1927-1983.