In cool weather it is sometimes possible to catch an Evening Primrose open in the middle of the day, though the flowers usually close by the middle of the morning. In an earlier article, we gave this description of it:
A tall and stately weed whose flowers we almost never get to see in their full glory. It’s a night-bloomer, opening at dusk and fading in the early hours of the morning.
Flowers. Pale yellow; four broad petals; cross-shaped anther in the middle; borne in branching racemes.
Leaves. Lanceolate, sessile, slightly toothed; net-veined, with center rib often reddish toward base; alternate; thick on the stem, with branches or abortive branches in axils; mostly smooth.
Stem. Stout; somewhat sticky; woody below, with dark brownish stripes; to 6 feet or more; much branched.