Hypericum perforatum

Native of Africa, Asia, and Europe. Introduced and naturalized in the United States.

Disturbed areas, roadsides.

June to September

Yellow

24″ to 36″

The flower petals have black dots at the margins.

The leaves are about 1″ long and ⅓″ wide. Tiny, translucent dots can be seen when they are held up to the light.

Spotted St. Johnswort (Hypericum punctatum) is a taller plant, up to 40″ tall. Black dots or streaks may appear anywhere on the under surface of the flower petal. The leaves are oval, up to 2½″ long and 1″ wide. They have tiny black spots, not translucent ones.

Pale St. Johnswort (Hypericum ellipticum) has erect, unbranched stems arising from a rhizome with a few flowers at the end of the stem. The leaves are elliptical. The flowers are pale yellow.