| Jaboticaba | Myrciaria |
| Juckbohne | Canavalia |
| Jackfruchtbaum | Artocarpus |
| Jagerblume | Callianthemum |
| Jakobskraut | Senecio |
| Jakobsleiter | Polemonium |
| Jakobslilie | Sprekelia |
| Jambolanapflaume | Syzygium |
| Jambos | Syzygium |
| Java-Kardamom | Amomum |
| Jehowablümchen | Saxifraga |
| Jelangerjelieber | Lonicera |
| Jerusalembohne | Vigna |
| Johannisbeere | Ribes |
| Johannisbeertomate | Solanum |
| Johannisbrotbaum | Ceratonia |
| Johanniskraut | Hypericum |
| Jojobastrauch | Simmandsia |
| Jonquille | Narcissus |
| Joshuabaum | Yucca |
| Juckbohne | Mucuna |
| Juckfasel | Mucuna |
| Judasbaum | Cercis |
| Judassilberling | Lunaria |
| Judenbart | Saxifraga |
| Jujube | Ziziphus |
| Jungfer im Grünen | Nigella |
| Jungfernrebe | Parthenocissus |
| Junkerlilie | Asphodeline |
| Jupiterblume | Lychnis |
| Jupiters Bart | Anthyllis |
| Jute | Corchorus |
| Jute, Chinesische | Abutilon |