千屈菜
Invasive species of plants considered threats include redtop ("Agrostis stolonifera"), musk thistle ("Carduus nutans"), spotted knapweed ("Centaurea maculosa"), Russian knapweed ("Acroptilon repens"), creeping thistle ("Cirsium arvense"), Fullers teasel ("Dipsacus fullonum"), oleaster ("Elaeagnus angustifolia"), quickgrass ("Elytrigia repens"), leafy spurge ("Euphorbia esula"), peppergrass ("Lepidium latifolium"), purple loosestrife ("Lythrum salicaria"), reed canary grass ("Phalaris arundinacea"), sow thistle ("Sonchus arvensis"), and saltcedar ("Tamarix chinensis").