Iranian Knapweed 
Italian Aster 
Italian bellflower 
Italian Thistle 
Ixeridium Dentatum 
Ixodia achillaeoides 
Jacobaea pancicii 
Jersey Cudweed 
Jerusalem Artichoke 
Jurinea mollis 
Jurinea staehelinae 
Kalm's Lobelia 
Kenikir 
Kidney-leaf Rosinweed 
Klasea cerinthifolia 
Klasea pusilla 
Kleinia neriifolia 
Koelpinia linearis 
Korean Dandelion 
Korean Dandelion 
Lachnophyllum noeanum 
Lactuca aculeata 
Lactuca hispida 
Lactuca orientalis