Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). Much larger flowers at 50-80mm than Common EP. But more importantly, the latter has a style the same length-ish as the stamens - here you can see the style is much longer which is a main ID feature for Large-flowered.

Large-Flowered Evening Primrose, (Oenothera glazioviana) (20/08/2023) Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). Much larger flowers at 50-80mm than Common EP. But more importantly, the latter has a style the same length-ish as the stamens - here you can see the style is much longer which is a main ID feature for Large-flowered.

Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). The very long style upon which the 4 pronged stigma sits. Way longer than the staments - as said earlier, Common EP has the style about the same length as the Stamens.

Large-Flowered Evening Primrose, (Oenothera glazioviana) (20/08/2023) Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). The very long style upon which the 4 pronged stigma sits. Way longer than the staments - as said earlier, Common EP has the style about the same length as the Stamens.

Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). Common EP doesn't have these red/orange sepals (or therefore flower buds).

Large-Flowered Evening Primrose, (Oenothera glazioviana) (20/08/2023) Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). Common EP doesn't have these red/orange sepals (or therefore flower buds).

Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). The flower is so big that it tends to make the plant lean over!

Large-Flowered Evening Primrose, (Oenothera glazioviana) (29/06/2020) Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). The flower is so big that it tends to make the plant lean over!

Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). Classic leaves said to have a slight "twist" rather than being flat like those of Common EP.

Large-Flowered Evening Primrose, (Oenothera glazioviana) (24/09/2021) Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). Classic leaves said to have a slight "twist" rather than being flat like those of Common EP.

Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). And the stem has hairs with bulbous red bases. Common EP can have them to some extent, but not as much as this.

Large-Flowered Evening Primrose, (Oenothera glazioviana) (29/06/2020) Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). And the stem has hairs with bulbous red bases. Common EP can have them to some extent, but not as much as this.

Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). Seed capsules have some glandular hairs.

Large-Flowered Evening Primrose, (Oenothera glazioviana) (29/06/2020) Southbank Barn, New Hall Lane, Small Dole, Henfield, W Sussex (opposite house). Seed capsules have some glandular hairs.