Helianthus ambiguus

Helianthus ambiguus
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Helianthus
Species:	H. ambiguus
Binomial name
	Helianthus ambiguus; (Torr. & A.Gray) Britton
Synonyms
	Helianthus giganteus var. ambiguus Torr. & A.Gray;

Helianthus ambiguus is a North American species of sunflower known by the common name ambiguous sunflower. It is found only in the Great Lakes region of the United States, the states of New York, Michigan, Ohio, and Wisconsin.^[2]

Description

Helianthus ambiguus is an herb up to 80 cm (31.5 in) tall. Leaves are long and narrow, lance-shaped, up to 15 cm (6 in) long. One plant produces a few flower heads, each 7–8 cm (3–3 in) across.^[3]

References

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[1] The Plant List, Helianthus ambiguus Britton

[2] Biota of North America Program 2014 county distribution map

[3] Britton, Nathaniel Lord 1901. Manual of the Flora of the northern States and Canada 993

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