Common evening primrose

Family: Onagraceae
Scientific name: Oenothera stricta
Description: Plant Form: Erect annual or biennial herb. Size: Up to 1 m tall. Stem: Initially covered with hairs, but losing them with age. Leaves: Linear to oblong or lance-shaped. 5-20 cm long in rosette, smaller and clasping stem higher up. With widely spaced teeth along edges. Flowers: Bright yellow fading to pink or orangey-red. With 4 soft flappy petals. On stem at joins with leaf-like bracts. Fruit and Seeds: Almost cylindrical capsule, wider at top, 3-4 cm long, with a sparse covering of long hairs. Habitat: Disturbed areas, pastures, grasslands, roadsides, dunes. Weed Status: Other Weed Weed Type: Environmental, Invasive Garden Escapee Lifeform: Herbaceous

Example images for this weed