Family: Hypericaceae. Genus: Hypericum.
Hypericum is a genus of about 400 species of flowering plants in the family Hypericaceae.
Scientific name: Hypericum calycinum. Common name: Aaron's beard. Height; 6-18 in.(15-45 cm). Flower color: bright yellow. They have five spreading petals and a dense tuft of protruding yellow stamens.
Scientific name: Hypericum patulum. Common name: Goldencup St. Johnswort. Height: 18-36 in. (45-90 cm). Spacing: 18-24 in. (45-60 cm). Flower color: Yellow. Bloom in Summer.