[The St. John's-wort Family in Mt. Adams Country]

Common St. Johnswort, Common St. John's-wort, Klamathweed, Klamath Weed

Hypericum perforatum var. perforatum

Synonym: Hypericum perforatum

Close-up of the flowers of Common St. Johnswort, Common St. John's-wort, Klamathweed, Klamath Weed: Hypericum perforatum var. perforatum (Synonym: Hypericum perforatum)

The photo above shows a close-up of the flowers of common St. John's-wort at the Mt. Adams Viewpoint on Rd #23 on August 6, 2005. Note the numerous black spots (blackish glands) around the edges of the petals.

Where This Species May be Found on Mt. Adams:

Common St. John's-wort may be found in disturbed areas, especially along roads, generally below 4000'. I have yet to see it along any roads on the north and northeastern side of Mt. Adams, although that doesn't mean it's not there.


Close-up sideview of the flower of Common St. Johnswort, Common St. John's-wort, Klamathweed, Klamath Weed: Hypericum perforatum var. perforatum (Synonym: Hypericum perforatum)

The photo above shows a close-up side-view of the flower of common St. John's-wort at the Mt. Adams Viewpoint on Rd #23 on August 6, 2005.

Stem leaf of Common St. Johnswort, Common St. John's-wort, Klamathweed, Klamath Weed: Hypericum perforatum var. perforatum (Synonym: Hypericum perforatum)

The photo above shows a stem leaf of common St. John's-wort at the Mt. Adams Viewpoint on Rd #23 on August 6, 2005. It is not easy to see here, but with a hand lens, one can notice numerous minute, circular areas in the leaf blade which let light through, hence the species name perforatum.

Paul Slichter