The bulk update request #94 has been rejected.
evergreen_tree is overly broad.
Trees commonly referred to as evergreen trees include holly, magnolias, and bamboo. Coconut, fern, eucalyptus, and a whole host of rainforest trees (both temperate and tropical) are also technically evergreen trees.
evergreen_tree is only used in 6 posts, all for conifers, so it is a safe rename if we want to tag conifers as such without being too specific. Alternatively, we could just nuke the tag, and tag posts with spruce, fir, pine_tree, etc, when they are prominent enough to be tagged.
Edit: Danbooru has 7104 christmas_tree posts, the majority of which I'm sure are confiers, and 901 pine_tree posts. It is barely tagged on Danbooru, so I'm not sure how much value conifer has either. Even if we alias conifer to most conifer trees, we would still have to manually tag which christmas_tree posts are conifers and which are not. A lot of effort for a tag I'm sure the majority of users here won't even care about.