Ontario Trees & Shrubs website

Kalm's St Johnswort
Hypericum kalmianum

French names: Millepertuis de Kalm

Family: St. Johnswort Family (Hypericaceae)

Distinctive features: Shrub

Flowers: Summer;  Yellow;  5 parts (petals)

Leaves: Opposite/Whorled, Simple, Entire

Height: 1 m (3 ft)

Habitat: Fields and Open Areas, Wet Areas

Books: Shrubs of Ontario: 323    Newcomb's Wildflower Guide: 294   

Native/Non-native: Native

Photographs: 102 photographs available, of which 1 are featured on this page. SCROLL DOWN FOR PHOTOGRAPHS.

Kalm's St Johnswort (Hypericum kalmianum)
Photograph by Graham Buck