This forest has Engelmann spruce, mountain hemlock, and subalpine fir. Sitka spruce, western hemlock, silver fir, mountain hemlock, and subalpine parkland. It protects of red spruce and eastern hemlock upland forest. The Sitka spruce zone is a lowland zone dominated by Sitka spruce and western hemlock. Flora also includes grass, shrubs, hemlock and mixed-oak pine forests. These include western hemlock, western redcedar, grand fir, mountain hemlock, and larches. Hardwood forests also include yellow birch, sugar and red maple, eastern hemlock, and black cherry. Elk prefer more humid areas, the Sitka spruce, wet western hemlock, and mountain hemlock zones. The infection also affects rhubarb, snowdrops, white meadowfoam, western hemlock, Douglas-fir and cannabis. Each of these virgin forests produced of white pine and of hemlock and hardwoods. Rosemary is an aromatic evergreen shrub with leaves similar to hemlock needles. This is due to loss of boreal forests from hemlock woolly adelgid, logging, and pollution. Examples of highly toxic herbs include poison hemlock and nightshade. This alcohol-based mixture contained bile, opium, lettuce, bryony, henbane, hemlock and vinegar. The state tree is the western hemlock.