Picea mariana
Although it is north of the natural tree line, there are some short, south-facing imported black spruce ("Picea mariana") specimens protected by snowdrifts in the winter, in addition to a few shrubs, which are woody plants. These include the Arctic willow ("Salix arctica"), which is hard to recognize as a tree because of its low height. The Arctic willow may be up to around horizontally, but only tall.