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, 07:40, 17 October 2009
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Describe the plant here...
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Helianthella (the plant resembles Helianthus). Compositae. Hardy perennial herbs from North America, with showy yellow heads borne in autumn.
Stem commonly unbranched: lvs. mostly scattered and sessile, linear or lanceolate, entire: heads solitary or few, with yellow infertile rays and a yellow or brownish disk.—Thirteen species. Helianthella belongs to a group of genera distinguished from Helianthus by having the frs. laterally compressed instead of thick and obtusely angled. Other cult, genera of this group are Actinomeris, Encelia and Verbesina, which are distinguished from one another by combinations of fr. and pappus characters.
The single species in cultivation is easily grown in a variety of soils, and is propagated by seeds or by dividing the rootstocks.
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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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