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Home  /  Plants  /  Budburst Species  /  Helianthus annuus
Phenology Observation Sheet for Wildflowers and Herbs

COMMON NAME

Annual sunflower

SCIENTIFIC NAME

Helianthus annuus

Plant family

Aster (Asteraceae)

Plant group

Wildflowers and Herbs

This sunflower species has rough, hairy stems, triangular-shaped leaves, and flower heads up to 6 inches wide. It can be between 2 and 10 feet tall.
263 reports
149+
OBSERVERS
263+
OBSERVATIONS
!

Identification hints

This sunflower species has rough, hairy stems, triangular-shaped leaves, and flower heads up to 6 inches wide. It can be between 2 and 10 feet tall.
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Did you know?

The name "Helianthus" is from the Greek words "helios" for sun and "anthos" for flower. Native Americans were the first to domesticate sunflowers by selecting for larger and larger seeds. Annual sunflower is common throughout the US and Canada and grows best in full sun.
DISTRIBUTION IN TH U.S.
Alaska , Alabama , Arkansas , Arizona , California , Colorado , Connecticut , Delaware , Florida , Georgia , Hawaii , Iowa , Idaho , Illinois , Indiana , Kansas , Kentucky , Louisiana , Massachusetts , Maryland , Maine , Michigan , Minnesota , Missouri , Mississippi , Montana , North Carolina , North Dakota , Nebraska , New Hampshire , New Jersey , New Mexico , Nevada , New York , Ohio , Oklahoma , Oregon , Pennsylvania , Rhode Island , South Carolina , South Dakota , Tennessee , Texas , Utah , Virginia , Vermont , Washington , Wisconsin , West Virginia , Wyoming
HABITAT
There is no information available about this species.

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