URL：https://get.pxhere.com/photo/tree-nature-forest-wilderness-branch-plant-hiking-leaf-flower-summer-stream-green-jungle-botany-fern-plants-trees-creativecommons-cool-image-spruce-vegetation-rainforest-monroecounty-poconos-deciduous-understory-undergrowth-ferns-pennsylvania-delawarestateforest-woodland-habitat-i-ecosystem-biome-old-growth-forest-natural-environment-geographical-feature-temperate-broadleaf-and-mixed-forest-temperate-coniferous-forest-land-plant-ferns-and-horsetails-vascular-plant-riparian-forest-113421.jpg
掲載元：https://pxhere.com/ja/photo/113421
