Related by context. Frequent words. (Click for all words.) 63 loosestrife 63 Scotch broom 62 Hydrilla 61 pampas grass 60 buffelgrass 59 salt cedar 58 purple loosestrife 58 tamarisk 57 nonnative plants 57 phragmites 57 knotweed 57 hackberry 56 invasive weeds 56 aquatic weeds 56 adelgids 56 Japanese knotweed 56 spotted knapweed 55 grasses 55 invasive species 55 Eurasian milfoil 54 cheatgrass 54 manzanita 54 junipers 54 vegetation 54 foxtail 54 conifers 54 cottonwood 53 cottonwoods 53 whiteflies 53 buckthorn 53 barberry 53 Nutria 53 lodgepole 53 sedge 53 woody plants 53 invasive weed 53 hemlock woolly adelgid 53 kelp beds 53 conifer 52 giant salvinia 52 woody debris 52 hemlock trees 52 saltcedar 52 Gypsy moths 52 lupines 52 leafy spurge 52 beetles 52 shrubby 52 evergreen shrub 52 willows 52 sequoias 52 weevils 52 aquatic weed 52 adelgid 52 spurge 52 weeds 52 cankers 52 deciduous tree 52 Eurasian watermilfoil 52 weevil 52 shrub 52 cattail 52 invasives 52 hardwood trees 52 cycad 51 horsetail 51 orchid species 51 hickories 51 agaves 51 mealybugs 51 spp 51 species 51 conifer trees 51 hydrilla 51 Phytophthora 51 beetle 51 jack pine 51 knapweed 51 oleanders 51 tussock 51 freshwater shrimp 51 vetch 51 psyllid 51 water hyacinth 51 lodgepole pine 51 anthracnose 51 red cockaded woodpecker 51 Didymo 50 hemlocks 50 spider mites 50 oak woodland 50 cattails 50 mesquite trees 50 Sedum 50 sycamore trees 50 tules 50 giant hogweed 50 japonica 50 palmettos 50 fern 50 Argentine ants