False Sunflower (Heliopsis helianthoides) (Linnaeus, 1753)

 

Synonyms: Buphthalmum helianthoides, Acmella flavicaulis, Acmella nudicaulis, Heliopsis oppositifolia, Rudbeckia oppositifolia, Silphium solidaginoides, Buphthalmum melissoides, Smooth Oxeye

 

 

Heliopsis helianthoides is native to eastern and central North America from Saskatchewan east to the Maritime Provinces of Canada, and south to New Mexico, Texas, and Georgia (Map). Introduced in British Columbia, Newfoundland, and Prince Edward Island. It grows in a variety of soils in open woodlands, prairie remnants, meadows, fringes of marshes, old pastures, and roadsides; 0-2,300 m. This is a short-lived perennial herb growing 40-150 cm in height. The stems are stiff, usually branched, yellowish to reddish brown, glabrous or hairy. The leaves are ovate to lanceolate with coarsely dentate margins; sparsely pubescent. The flowerheads (1-15) contain 10-18 ray florets with yellow to orange-yellow corollas, and 10-75 yellowish or brownish disk florets. The fruit is an achene. H. helianthoides flowers from late spring to early autumn.

 

		D61549 False Sunflower (Heliopsis helianthoides) Prince Gallitzin State Park Pennsylvania, USA Copyright © Michael Patrikeev All Rights Reserved
		D61545 False Sunflower (Heliopsis helianthoides) Prince Gallitzin State Park Pennsylvania, USA Copyright © Michael Patrikeev All Rights Reserved
		D61022 False Sunflower (Heliopsis helianthoides) Canoe Creek State Park Pennsylvania, USA Copyright © Michael Patrikeev All Rights Reserved

 

		D61543 False Sunflower (Heliopsis helianthoides) Prince Gallitzin State Park Pennsylvania, USA Copyright © Michael Patrikeev All Rights Reserved
		D61026 False Sunflower (Heliopsis helianthoides) Canoe Creek State Park Pennsylvania, USA Copyright © Michael Patrikeev All Rights Reserved

 

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