Related by context. Frequent words. (Click for all words.) 66 salt cedar 66 invasive weeds 65 tamarisk 65 Invasive plants 63 Phragmites 63 aquatic weeds 63 melaleuca 62 buffelgrass 62 Eurasian milfoil 61 salvinia 61 spotted knapweed 60 Scotch broom 60 purple loosestrife 60 phragmites 59 vegetation 59 tent caterpillars 58 nonnative plants 58 pampas grass 58 Eurasian watermilfoil 58 aquatic weed 58 saltcedar 58 Hydrilla 57 cankers 57 carbaryl 57 piñon 57 horsetail 57 ceanothus 57 Japanese knotweed 57 lodgepole 57 aspen stands 57 oleanders 57 forested wetlands 57 riparian zones 56 whiteflies 56 junipers 56 cordgrass 56 knotweed 56 willows 56 leafy spurge 56 riparian vegetation 56 forbs 56 hydrilla 56 hackberry 56 hemlock trees 56 invasive weed 56 weeds 56 conifer trees 56 stinkbugs 56 knapweed 56 hogweed 55 defoliating 55 cattail 55 cheatgrass 55 bagworms 55 Controlled burns 55 noxious weeds 55 fireweed 55 adelgids 55 acidic soils 55 beetle infestations 55 cottonwoods 55 woody plants 55 grasses 55 giant salvinia 55 moth larvae 55 loosestrife 55 berry bushes 54 spurge 54 lakeshores 54 invasives 54 hickories 54 oxalis 54 hemlock woolly adelgid 54 cattails 54 manzanita 54 woody stems 54 salal 54 noxious weed 54 cottonwood trees 54 tunicates 54 beetle infestation 53 ponderosa 53 buckthorn 53 streambeds 53 acidify 53 tansy 53 Gypsy moths 53 atmospheric nitrogen 53 salination 53 freshwater marshes 53 hardwood trees 53 mountain pine beetles 53 tree canopies 53 Milfoil 53 pine plantations 53 ponderosa pines 53 sea lampreys 53 weevils 53 deadfall 53 Rotenone 53 understory