Hypericum perforatum

Common Name: 
St. Johnswort, klamathweed
Scientific Name: 
Hypericum perforatum L.
Family Name: 
Hyperiacaceae - St. Johnswort Family
Identification Notes
Life Cycle
introduced perennial, reproducing by seeds and roots
Stems
upright, smooth, very branched, often becomes woody below
Growth Habit of St. Johnswort
Growth Habit of St. Johnswort
Leaves
opposite, elliptic to oblong, sessile, many very small translucent dots
Leaves of St. Johnswort
Leaves of St. Johnswort
Flowers
5-petaled, orange-yellow, petal margins often with black spots, stamens many; terminal clusters above
Flowers of St. Johnswort
Flowers of St. Johnswort