Introduction of Cover Photo

摘要

正Oenothera biennis L. (evening primrose, evening star) is a species of Oenothera L. native to eastern and central North America, from Newfoundland west to Alberta, southeast to Florida, and southwest to Texas, and widely naturalized elsewhere in temperate and subtropical regions. O. biennis has a life span of two years (biennial) growing to 30-150 cm tall. The leaves are lanceolate, 5-20 cm long and 1-2.5 cm broad, produced in a tight rosette the first