Related by context. Frequent words. (Click for all words.) 61 piñon 61 aspen stands 60 lodgepole 60 Ponderosa pines 59 Ponderosa pine 59 conifer forests 57 conifer trees 57 ponderosa 56 lodgepole pine 56 coniferous forests 56 junipers 56 temperate forests 56 beetle infestations 56 deciduous forests 56 loblolly pines 56 sequoias 55 tamarack 55 oak hickory 55 ponderosa pines 55 mountain pine beetles 54 mixed conifer 54 coniferous trees 54 woody plants 54 lodgepole pines 54 hickories 54 aspen 54 bur oak 54 cottonwood 53 pine trees 53 sagebrush 53 woody vegetation 53 conifers 53 Invasive plants 53 manzanita 53 evergreen forests 53 Amazonian rainforest 53 hackberry 53 forbs 53 grasses 53 vegetation 53 mesquite 53 hemlock trees 53 longleaf pines 53 acidic soils 52 grassland habitat 52 red cedars 52 longleaf pine 52 montane 52 Chihuahuan Desert 52 aspen trees 52 temperate rainforest 51 hawthorns 51 juniper 51 trees 51 serviceberry 51 cottonwood trees 51 bark beetles 51 beetle infestation 51 giant sequoias 51 brushland 51 sparse vegetation 51 alkaline soils 51 yuccas 51 scrub oak 51 oak savanna 51 eucalypts 51 lichen 50 juniper trees 50 giant sequoia 50 deciduous forest 50 tupelo 50 mesquite trees 50 shrubby 50 sawfly 50 beetle epidemic 50 cottonwoods 50 cypress swamps 50 herbaceous perennials 50 oak woodlands 50 tent caterpillars 50 juniper tree 50 barrens 50 loblolly pine 50 Gypsy moths 50 salal 50 sagebrush habitat 50 Greater Yellowstone Ecosystem 50 mountain laurel 50 ponderosa pine 50 oak woodland 50 herbaceous plants 49 cypress forests 49 bark beetle infestation 49 pinon 49 melaleuca 49 riparian zones 49 forest canopies 49 beeches 49 coniferous 49 deciduous tree 49 lowland forests