Northern Prairie Wildlife Research Center
Southern Wetland Flora
Field Office Guide to Plant Species
Bushy St. Johnswort
Hypericum densiflorum Pursh
- Family: St. Johnswort (Hypericaceae)
- Flowering: June-August
- Field Marks: This shrubby St. Johnswort differs from other shrubby species by its small
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
- 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.
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