Great St. Johnswort

(Hypericum ascyron)

 

Color Drawing: Wolcott, M.V. 1925. North American Wild Flowers. Smithsonian Institution.

Line Drawing: Britton, N.L., and A. Brown. 1913. An Illustrated Flora of the Northern United States and Canada, Second Edition.

 

Great St. Johnswort (Hypericum ascyron)

Identification: Flowers large (about 2 inches in diameter), yellow-orange, with 5 petals. Stamens numerous, orange, grouped into 5 sets. Five styles united at their base. Leaves large (2 to 3 inches in length), elliptical, tapering toward the apex, and not toothed on the margin. Leaves opposite. Plant 2 to 6 feet in height.

Distribution: Manitoba in the west to Maine in the east, southward to Kansas, Indiana, and Maryland.

Habitat: Great St. Johnswort is found along river and streambanks and other wet places.

Flowering period: June to August.

Great St. Johnswort (Hypericum ascyron)

Similar Species:

The large yellow-orange flowers with 5 united styles and numerous stamens are readily recognizable.

Similar Species

No Similar Species