Wildflowers of Toronto's High Park​​

Meadow-rues
​​Genus:Thalictrum  
​Family: Buttercup/Crowfoot
Native to Ontario

Meadow-rue, tall
T. pubescences

Perennial

Habitat: Moist places
Blooms: June to August

Height: Up to 3 m
Flower: About 8 mm

Male and female flowers on same plant. 
Meadow-rue, early
T.dioicum

Perennial

Habitat: Rich moist woods
Blooms: April to May

Height: Up to 70 cm
Flower: 6 mm with 4-5 sepals (no petals).

Male and female flowers are on separate plants (hence the species name which is derived from the Greek for "two households." Male flower has long dangling yellow stamens. Female flower has purple stigmas.