Wildflowers of Toronto's High Park​​

St.John's-wort 
Genus: Hypericum perforatum
​Family: St. Johnswort

St. Johnswort, common
H.perforatum
Introduced
Perennial

Blooms: June to September
Habitat: Open sites

Height: up to 80 cm

Flower: 2-2.5 cm,  in clusters.
Black dots on the margins of the petals.
St. Johnswort, shrubby
H.prolificum
Native to Ontario
Perennial

Blooms: Summer
Habitat: Prairies, rocky places

Height: up to 120 cm

Flower: 2-2.5 cm.