Flower:

Flowers are in groups of 3 or more at the end of branching stems in the upper part of the plant. Individual flowers are pale to rose pink, about ½ inch across, with 5 spreading notched petal-like sepals fused into a shallow tube. There are 3 or more long pink stamens with yellow tips. The flowers open in late afternoon and close in the morning.

Leaves and stem:

Most leaves are in the lower part of the plant, below the flowering branches. They are somewhat variable but typically up to 4 inches long and 1½ inches wide, toothless, with a pointed tip, tapering or rounded base and no leaf stem, oppositely attached. Leaves are hairy, especially along major veins on the underside, tend to point up, and the edges tend to be wavy. The main stem is a bit sticky, densely covered in short hairs, and usually lined, especially in the upper part.

Fruit:

Fruit is a small brown 5-angled pod, containing several seeds.

Notes:

Hairy Four O'clock is not a particularly rare plant, yet I had a hard time finding any information about it as it is not mentioned in any of my field guides or most other references. The flowers are basically the same as Wild Four O'clock, but the shape of the leaves and hairiness of the plant easily distinguish it. The best time to see the plant in bloom is very early morning when the sun is just rising. The flowers start closing up soon after. Hairy Four O'clock also goes by Latin name Mirabilis hirsuta, but the accepted name in Minnesota is Mirabilis albida.