Wildflowers of Toronto's High Park​​

Sunflowers and Artichoke, Jerusalem
Genus: ​Helianthus

Family: Composite/Aster

​Sunflower, pale-leaved
​H. strumosus

​Native to Ontario
Locally rare but very common in High Park
​Perennial

Habitat: Dry open woodlands and savannahs. 
Blooms: July to September

Height: up to 2.4 m

Leaves: Opposite, lance-shaped tapering to the tip, thick and rough, shallowly toothed, pale beneath with leaf stalks at least 6 mm.

Flower heads: 8-15 yellow 1.5-3 cm ray florets surrounding a 1-1.5 cm disk.   ​
​Sunflower, woodland
​H. divaricatus

​Native to Ontario.
Locally rare. Less prevelant in High Park,  than the pale-leaved sunflower.

​Perennial

Habitat: Dry open forests and savannahs
Blooms: July to September

Height: up to 1.8 m

Leaves: Opposite, lance-shaped tapering to the tip, rough on upper surface, with little or no leaf stalk.

Flower heads: 8-15 yellow 1.5-3 cm ray florets surrounding a 1-1.5 cm disk.   ​
​Artichoke, Jerusalem
​H. tuberosus

​Introduced

Habitat: fields and thickets
Blooms: August to October

​Leaves: egg-shaped, alternate on upper stem, coursely toothed, very rough and thick

Height: up to 3 m
Flower head: up to 7.5 cm

The common name "Jerusalem" comes from the Italian ​girasole ​meaning "turning to the sun."