Quillaja saponaria Radermachera sinica
Raphia farinifera Ravenala madagascariensis
Ravenea rivularis Reynosia septentrionalis
Rhamnus catharticus Rhamnus frangulus 'Asplenifolia'
Rhamnus frangulus 'Ron Williams (Fine Line®)' Rhaphiolepis umbellata
Rhapidophyllum hystrix Rhapis excelsa
Rhapis humilis Rhizophora mangle
Rhodamnia argentea Rhododendron auriculatum
Rhododendron calophytum Rhododendron decorum
Rhododendron fulvum Rhododendron grande ssp. grandia
Rhododendron griffithianum var. roseum Rhododendron orbiculare ssp. orbiculare
Rhododendron oreodoxa var. fargesii Rhododendron protistum ssp. grandia
Rhododendron rubiginosum Rhododendron strigillosum
Rhodoleia championii Rhopalostylis baueri
Rhopalostylis sapida Rhus chinensis
Rhus chinensis 'September Beauty' Rhus copallina
Rhus copallina var. latifolia Rhus integrifolia
Rhus lancea Rhus typhina
Rhus typhina 'Lanciniata' Robinia x ambigua 'Idahoensis'
Robinia x margaretta 'Idaho' Robinia neomexicana
Robinia pseudoacacia Robinia pseudoacacia 'Aurea'
Robinia pseudoacacia 'Frisia' Robinia pseudoacacia 'Purple Robe'
Robinia pseudoacacia 'Tortuosa' Roystonea borinquena
Roystonea elata Roystonea hispaniolana
Roystonea oleracea Roystonea princeps
Roystonea regia Roystonea spp.
Roystonea venezuelana Sabal bermudana
Sabal blackburniana Sabal causiarum
Sabal jamaicensis Sabal mauritiiformis
Sabal mexicana Sabal minor
Sabal palmetto Sabal parviflora
Sabal rosei Sabal uresana
Salix alba Salix alba 'Rockanje'
Salix alba 'Tristis' Salix alba var. vitellina
Salix amygdaloides Salix babylonica
Salix caprea Salix caprea 'Pendula'
Salix caroliniana Salix discolor
Salix gooddingii Salix matsudana
Salix matsudana 'Pendula' Salix matsudana 'Tortuosa'
Salix nigra Salix pentandra
Sambucus mexicana Sambucus racemosa 'Plumosa Aurea'
Sapindus drumondii Sapindus mukorossi ssp. carinatus
Sapindus saponaria Sapium japonicum
Sapium sebiferum Sassafras albidum
Sassafras tzumu Schaefferia frutescens
Schefflera actinophylla Schefflera actinophylla 'Amate™'
Schefflera elegantissima Schinus molle
Schippia concolor Schotia brachypetala
Sciadopitys verticillata Senegalia greggii
Senna candolleana Senna spectabilis