St. Johnswort

( Hypericum perforatum )

Numerous, rust colored stems at base of plant
Pale to yellow-green leaves with small transparent dots
Bright yellow, 5-petaled flowers with tiny, black dots visible when held up to light; prominent stamens
Height 1 to 3 feet

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Type	Information
Toxicity	Humans and livestock.
Control	Hand pulling/digging, mowing, biological and herbicide. Contact your county weed district or local Applicator for more information.
Habitat	Pastures, waste areas, roadsides and sandy, gravelly soil.
Root	Extensive, deep root system.
Leaf Shape	Linar or oblong with rounded or pointed tips.
Lifespan	Perennial; two years or longer.
Priority 2B Weed	Abundant in Montana and widespread in many counties.
Similar Looking Plants	Ornamental St. Johnswort and tansy ragwort.
Important Information	Plant contains a toxic substance which causes skin sores/rash and sun sensitivity in humans and animals. This plant is purported to have numerous medicinal properties.