View source for Helianthus grosse-serratus

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Describe the plant here...
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Helianthus grosse-serratus, Mart. St. 6-10 ft. high, very smooth, glaucous, the smaller branches strigose: lvs. long-lanceolate, slender-petioled, rough above, densely hairy or canescent beneath: fls. many, cymose, 1-3 in. broad; rays 10-20, deep yellow. Aug.-Oct. N. Y. and Pa. to Mo., south to Texas.—Passes into H. giqanteus.
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==Cultivation==
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===Propagation===
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===Pests and diseases===
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==Species==
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==Gallery==
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==References==
*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
<!--- xxxxx  *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608  -->

==External links==
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