Acoelorraphe wrightii Acrocomia crispa
Acrocomia spp. Actinidia deliciosa
Actinidia kolomikta Actinidia kolomikta 'Arctic Beauty'
Actinodium cumminghamii Adansonia digitata
Adenanthos cunninghamii Adenanthos sericeus
Adenium obesum Adenium obesum 'Crimson Star'
Adenostoma fasciculatum Adenostoma fasciculatum 'Black Diamond'
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 parviflora Aesculus parviflora f. serotina
Aesculus pavia Aesculus sylvatica
Aesculus turbinata Afrocarpus falcatus
Afrocarpus gracilior Afrocarpus usambarensis
Agarista populifolia Agathis macrophylla
Agathis moorei Agathis robusta
Agonis flexuosa Agonis flexuosa 'Belbra Gold'
Agonis flexuosa 'Nana' Ailanthus altissima
Aiphanes caryotifolia Akebia quinata
Akebia trifoliata Albizia julibrissin
Albizia julibrissin 'Pendula' Albizia julibrissin 'Rosea'
Albizia julibrissin 'Summer Chocolate' Albizia lebbeck
Albizia saman Albizia sinaloensis
Aleurites fordii Aleurites moluccana
Allamanda blanchetii Allamanda bolivinensis
Allamanda cathartica Allamanda cathartica 'Cherries Jubilee'
Allamanda cathartica 'Chocolate Cherry' Allamanda cathartica 'Florepleno'
Allamanda cathartica 'Hendersonii' Allamanda schottii
Alnus formosana Alnus glutinosa
Alnus glutinosa 'Imperialis' Alnus glutinosa 'Incisa'
Alnus glutinosa 'Pyramidalis' Alnus hirsuta
Alnus incana 'Laciniata' Alnus incana 'Pendula'
Alnus japonica Alnus maritima
Alnus orientalis Alnus rhombifolia
Alnus rubra Alnus tenuifolia
Alstonia constricta Alyogyne huegeli
Alyogyne huegeli 'Santa Cruz' Alyssum spinosum