Flora of Alberta

In central and northern Alberta the arrival of spring is marked by the early flowering of the prairie crocus (Pulsatilla nuttalliana) anemone; this member of the buttercup family has been recorded flowering as early as March, though April is the usual month for the general population.Other prairie flora known to flower early are the golden bean (Thermopsis rhombifolia) and wild rose (Rosa acicularis).Members of the sunflower (Helianthus) family blossom on the prairie in the summer months between July and September.The southern and east central parts of Alberta are covered by short prairie grass,which dries up as summer lengthens, to be replaced by hardy perennials such as the prairie coneflower (Ratibida), fleabane, and sage (Artemisia). Both yellow and white sweet clover (Melilotus) can be found throughout the southern and central areas of the province.

The wild rose is the provincial flower of Alberta.

The trees in the parkland region of the province grow in clumps and belts on the hillsides. These are largely deciduous, typically aspen, poplar, and willow. Many species of willow and other shrubs grow in virtually any terrain. North of the North Saskatchewan River, evergreen forests prevail for thousands of square kilometres. Aspen poplar, balsam poplar (Populus balsamifera) (or in some parts cottonwood (Populus deltoides), and paper birch (Betula papyrifera) are the primary large deciduous species. Conifers include jack pine (Pinus banksiana), Rocky Mountain pine, lodgepole pine (Pinus contorta), both white and black spruce, and the deciduous conifer tamarack (Larix laricina).