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.

Range Map is at the bottom of the page

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

Range map for Kalm's St Johnswort (Hypericum kalmianum)

PLEASE NOTE: A coloured Province or State means this species occurs somewhere in that Province/State.
The entire Province/State is coloured, regardless of where in that Province/State it occurs.

(Range map provided courtesy of the USDA website and is displayed here in accordance with their Policies)