Wildflowers of Toronto's High Park​​

Cup plant
​Silphium perfoliatum

This is one of High Park's rare endangered plants.  It is provincially rare, but prevalent in the park.

​Family: Composite/Aster
Native to Ontario

Blooms: July to October
Habitat: Thickets and stream banks

Height: up to 3 m 
Flower heads: up to 10 cm

Forms thick colonies.  Drought tolerant. 

​Leaves join around the stem, creating a cup which collects rain and dew, providing water for wildlife.  Leaf pairs are arranged alternately at right angles so that overflowing water drops into a lower cup. 

​Nectar attracts bees and butterflies.

​Seeds are eaten by goldfinches and chickadees.