Hairy Evening Primrose

Oenothera villosa, the hairy evening primrose, is a species of flowering plant in the family Onagraceae.^[5] It is native to nearly all of the United States (except Hawaii, Alaska, Louisiana, Florida, and South Carolina), and to all Canadian provinces and the Northwest Territories. It has been introduced to cool and cold-temperate regions worldwide.^[2] An erect biennial reaching 3–6 feet (0.91–1.83 m), it is typically found in open areas and disturbed situations.^[5]

This plant is a taproot dicotyledon (two stem leaves) biennial that has a red stem and is strigillose^[6]. This term means hairy. In this Scenario, the plant is covered in trichome hairs. The hairs are considered erect. This means that they stick straight out from the stem, not in a curled manner. The leaves are usually green in color and can have fully denticulate margins or part entire (smooth edges), part denticulate margins. in rarer scenarios the leaves can have moderate dentate margins. This all means that the leaves usually have small teeth on their edges, or have parts of their leaves of small-toothed edges. Also the rare moderate dentate margins means that sometimes a plant can be found with somewhat larger teeth on its leaf borders.