Common St. Johnswort, Common St. John's-wort, Klamathweed, Klamath Weed
Hypericum perforatum
Synonym: Hypericum perforatum ssp. perforatum
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Common St. John's-wort blooming in a waste area above the riparian area of the drained Howard Prairie Lake at Grizzly Creek Campground, Jackson County Parks, OR.....July 23, 2021.
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.
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.
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