Hypericum
St. John's-wort
12 species
2 subspecies and varieties
2 subspecies and varieties
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Hypericum anagalloides – bog John's-wort, creeping St. John's-wort, tinker's penny
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to Baja California, east to Montana.
Habitat: Moist ground, from the coast to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to Baja California, east to Montana.
Habitat: Moist ground, from the coast to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Hypericum boreale – northern St. John's-wort
Origin: Introduced from eastern North America
Growth Duration: Perennial
Origin: Introduced from eastern North America
Growth Duration: Perennial
Hypericum calycinum – Aaron's beard, great St. John's-wort
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California; also in eastern North America.
Habitat: Roadsides, cliffs, embankments, fields, parks, forest edge, wastelots, and other disturbed areas.
Origin: Introduced from Turkey and Bulgaria
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California; also in eastern North America.
Habitat: Roadsides, cliffs, embankments, fields, parks, forest edge, wastelots, and other disturbed areas.
Origin: Introduced from Turkey and Bulgaria
Flowers: May-July
Growth Duration: Perennial
Hypericum canadense – Canadian St. John's-wort
Origin: Introduced from eastern North America
Growth Duration: Annual, Perennial
Origin: Introduced from eastern North America
Growth Duration: Annual, Perennial
Hypericum maculatum – spotted St. John's-wort, streaked St. John's-wort
Origin: Introduced
Origin: Introduced
• ssp. obtusiusculum – dotted John's-wort, imperforate St. John's-wort
Hypericum majus – greater Canadian St. John's-wort
Distribution: Occurring in localities throughout Washington; British Columbia south to Oregon, east to the Atlantic Coast of North America.
Habitat: Wet ground.
Origin: Both native and introduced from eastern North America
Flowers: July-September
Growth Duration: Annual
Distribution: Occurring in localities throughout Washington; British Columbia south to Oregon, east to the Atlantic Coast of North America.
Habitat: Wet ground.
Origin: Both native and introduced from eastern North America
Flowers: July-September
Growth Duration: Annual
Hypericum mutilum – dwarf St. John's-wort
Origin: Introduced from eastern North America
Growth Duration: Annual, Perennial
Origin: Introduced from eastern North America
Growth Duration: Annual, Perennial
Hypericum perforatum – common St. John's-wort, Klamath weed
Distribution: Widespread on both sides of the Cascades crest in Washington; widespread throughout much of North America.
Habitat: Noxious weed of fields, meadows, roadsides, forest edge, wastelots, and other disturbed areas from the lowlands to near subalpine.
Origin: Introduced from Europe
Flowers: June-July
Growth Duration: Perennial
Distribution: Widespread on both sides of the Cascades crest in Washington; widespread throughout much of North America.
Habitat: Noxious weed of fields, meadows, roadsides, forest edge, wastelots, and other disturbed areas from the lowlands to near subalpine.
Origin: Introduced from Europe
Flowers: June-July
Growth Duration: Perennial
Hypericum scouleri – Norton's St. John's-wort, Scouler's St. John's-wort, western John's-wort
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Moist places from along the coast to well up in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Moist places from along the coast to well up in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Hypericum tetrapterum – square-stalked St. John's Wort
Distribution: Introduced occasionally in western Washington.
Habitat: Damp wasteland.
Origin: Introduced
Flowers: July - September
Growth Duration: Perennial
Distribution: Introduced occasionally in western Washington.
Habitat: Damp wasteland.
Origin: Introduced
Flowers: July - September
Growth Duration: Perennial
