Pineweed is a bushy plant with wiry, green stems. Its leaves are so small (less than 1.4 inch) that they escape notice. Despite the common names, this plant is neither a pine nor a grass; it is a St. Johnswort.
- Family: St. Johnswort (Hypericaceae)
- Habitat: rocky or sandy sites in sun
- Height: 3-18 inches
- Flower size: up to 1/4 inch across
- Flower color: yellow
- Flowering time: July to October
- Origin: native
Pineweed has dark-red fruits that may be more noticeable than the flowers.