ONAGRACEAE - EVENING PRIMROSE FAMILY
Herbs (in Turkey). Leaves simple, opposite, alternate, spirally arranged or alternate, usually exstipulate. Flowers solitary or paired in the leaf axils or in racemes, hermaphrodite, actinomorphic or weakly zygomorphic; hypanthial tube often present. Sepals 2, 4 or 5, valvate. Petals 0, 2, 4 or 5, free, contorted or imbricate, not crumpled in bud. Stamens 2 or 4 in a single whorl, or 8−10 in 2 whorls. Ovary inferior, (1−)2−, 4−or 5-locular with 1 to many anatropous ovules per loculus; style single. Fruit a capsule, or dry and indehiscent; seeds lacking endosperm.
Davis PH (1972). Onagraceae, In: Davis PH (ed.), Flora of Turkey and the East Aegean Islands, Edinburgh University Press, Edinburgh, 4: 180.
The “evening primrose family”, contains herbs, shrubs, and trees,is distributed in every continent from boreal to tropical regions. Most of the plants found in this family arecharacterised by flowers with usually four sepals and petals. This family includes some very popular ornamental garden plants, such as“eveningprimrose (Oenothera L.)” and “fuchsia (Fuchsia L.)”. Some of them, particularly the “willowherbs (Epilobium L.)” are common weeds in gardens and in the wild.
Anonymous (2016). https://en.wikipedia.org/wiki/Onagraceae/, Accessed date: 02.03.2016.