Acoelorraphe wrightii Acrocomia crispa
Acrocomia spp. Adansonia digitata
Adenanthos sericeus Adenostoma sparsifolium
Aesculus 'Homestead' Aesculus californica
Aesculus californica 'Canyon Pink' Aesculus x carnea
Aesculus x carnea 'Briotii' Aesculus x carnea 'Rubro-petiolata'
Aesculus flava Aesculus flava x pavia
Aesculus glabra Aesculus glabra 'Monticola'
Aesculus glabra 'Sargentii' Aesculus glabra var. arguta
Aesculus glabra var. pallida Aesculus hippocastanum
Aesculus hippocastanum 'Baumannii' Aesculus hippocastanum 'Memmingeri'
Aesculus hippocastanum 'Umbraculifera' Aesculus indica
Aesculus indica 'Sydney Pearce' Aesculus pavia
Aesculus sylvatica Aesculus turbinata
Afrocarpus falcatus Afrocarpus gracilior
Afrocarpus usambarensis Agathis macrophylla
Agathis moorei Agathis robusta
Agonis flexuosa Agonis flexuosa 'Belbra Gold'
Ailanthus altissima Aiphanes caryotifolia
Albizia julibrissin Albizia julibrissin 'Pendula'
Albizia julibrissin 'Rosea' Albizia julibrissin 'Summer Chocolate'
Albizia lebbeck Albizia saman
Albizia sinaloensis Aleurites fordii
Aleurites moluccana Alnus formosana
Alnus glutinosa Alnus glutinosa 'Imperialis'
Alnus glutinosa 'Incisa' Alnus glutinosa 'Pyramidalis'
Alnus hirsuta Alnus incana 'Laciniata'
Alnus incana 'Pendula' Alnus japonica
Alnus orientalis Alnus rhombifolia
Alnus rubra Alnus tenuifolia
Aloe marlothii Aloe plicatilis
Aloe thraskii Alstonia constricta
Amelanchier x Amelanchier alnifolia
Amelanchier arborea Amelanchier canadensis
Amelanchier canadensis 'Tradition' Amelanchier x grandiflora
Amelanchier x grandiflora 'Autumn Brilliance' Amelanchier x grandiflora 'Cole's Select'
Amelanchier x grandiflora 'Princess Diana' Amelanchier x grandiflora 'Robin Hill'
Amelanchier x grandiflora 'Strata' Amelanchier laevis
Amelanchier laevis 'Cumulus' Amelanchier laevis 'Lancifolia'
Amelanchier lamarckii Amphitecna latifolia
Anacardium occidentale Angophora hispida
Annona glabra Annona muricata
Annona reticulata Aphananthe aspera
Araucaria angustifolia Araucaria araucana
Araucaria bidwillii Araucaria biramulata
Araucaria columnaris Araucaria cunninghamii
Araucaria heterophylla Araucaria hunsteinii
Araucaria luxurians Araucaria montana
Araucaria muelleri Araucaria subulata