Common Evening Primrose

Common Evening Primrose
Oenothera biennis

There are more poems about the Evening Primrose than any other plant I've looked into. Here's a nice one by 19th century poet, John Clare.

When once the sun sinks in the west,
And dewdrops pearl the evening's breast;
Almost as pale as moonbeams are,
Or its companionable star,
The evening primrose opes anew
Its delicate blossoms to the dew;
And, hermit-like, shunning the light,
Wastes its fair bloom upon the night,
Who, blindfold to its fond caresses,
Knows not the beauty it possesses;
Thus it blooms on while night is by;
When day looks out with open eye,
Bashed at the gaze it cannot shun,
It faints and withers and is gone.