The sweet pea (Lathyrus odoratus) is a flowering plant in the genus Lathyrus in the family Fabaceae (legumes), native to Sicily, Cyprus, southern Italy and the Aegean Islands.It is an annual climbing plant, growing to a height of 1–2 metres (3 ft 3 in–6 ft 7 in), where suitable support is available. The leaves are pinnate with two leaflets and a terminal tendril, which twines around supporting plants and structures, helping the sweet pea to climb. In the wild plant the flowers are purple, 2–3.5 centimetres (0.79–1.38 in) broad; they are larger and very variable in color in the many cultivars. The annual species, L. odoratus, may be confused with the everlasting pea, L. latifolius, a perennial.