Dense-flowered St. Johnswort
Hypericum densiflorum
From the USGS
Family: St. Johnswort (Hypericaceae)
Flowering: June-August
Field Marks: This shrubby St. Johnswort differs from other shrubby species by its small capsules about 1/4 inch long and its largest leaves about 1 1/2 inches long or longer.
Habitat: Bogs, moist to dry woods, wet meadows, along streams, around lakes and ponds, wet ditches, floodplains.
Habit: Shrub up to 7 feet tall.
Stems: Much branched, smooth.
Leaves: Opposite, simple, linear to elliptic to oblong, rounded at the tip, tapering to the base, smooth, dotted at least on the upper surface, up to 2 inches long, up to 1/4 inch wide, with several leaves in the axils of the main leaves.
Flowers: Several, in terminal cymes, up to 2/3 inch across, on stalks up to 1/3 inch long.
Sepals: 5, green, free from each other, shorter than the petals, linear, up to 1/3 inch long.
Petals: 5, yellow, free from each other, up to 1/2 inch long.
Stamens: Numerous, free from each other.
Pistils: Ovary superior; styles 3, but usually united to form a beak.
Fruits: Capsules ovoid, smooth, up to 1/4 inch long; seeds numerous, red-brown.