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''Helenium'' is a genus of annuals and deciduous herbaceous perennials in the sunflower family native to the Americas.〔(Linnaeus, Carl von. 1753. Species Plantarum 2: 886 ) in Latin〕〔(Tropicos, Helenium L )〕 They bear yellow or orange daisy-like composite flowers. A number of these species (particularly ''Helenium autumnale'') have the common name sneezeweed, based on the former use of their dried leaves in making snuff. It was inhaled to cause sneezing that would supposedly rid the body of evil spirits. Larger species may grow up to tall. The genus is named for Helen of Troy, daughter of Zeus and Leda.〔(Flora of North America Vol. 21 Page 426 Sneezeweed ''Helenium'' Linnaeus, Sp. Pl. 2: 886. 1753; Gen. Pl. ed. 5, 377. 1754. )〕〔Homer. Circa 760–710 BCE. Iliad.〕 ''Helenium'' species are used as food plants by the larvae of some Lepidoptera species including ''Phymatopus behrensii''. ;Species〔〔(Biota of North America Program 2013 county distribution maps )〕〔Turner, B. L. 2013. The comps of Mexico. A systematic account of the family Asteraceae (chapter 11: tribe Helenieae). Phytologia Memoirs 16: 1–100〕 ==Cultivation== Numerous cultivars have been developed for garden use - mainly from ''H. autumnale'' and ''H. bigelovii''. They are useful for late summer and fall bloom, usually in less formal compositions. They are appropriate for native gardens in areas where they are indigenous, and they look wonderfully in bouquets. Annual species are easily grown from seed, and perennials should be divided every year in order to retain their vigor. The soil should be fertile with a generous amount of organic manner in the form of compost, manure or other decayed organic matter in addition to, perhaps, an application of a complete fertilizer in spring. Heleniums should be grown in full sun average to moist soil with good drainage. They are drought tolerant, but should be watered on planting and regularly until established. The following have gained the Royal Horticultural Society's Award of Garden Merit:- ''Helenium Hybrid'' has brilliant yellow petals surrounding spherical brown cones covered with golden pollen. It grows to tall and takes up about of space, the hardiness zone rating is 4-9. Its Flowers appear for six weeks from mid to late summer and attract butterflies in droves. It provides a splash of colour when many other perennials are starting to fade, it may accompany ornamental grasses, Phlox and Liatris. The UK National Collection of Heleniums is located at Yew Tree House, Hall Lane, Hankelow. near Audlem in Cheshire.〔(Welcome to Chester & Cheshire, Helenium National Collection Weekend )〕〔(Special Perennials, National Collections of ''Helenium'' and ''Centaurea'', Hankelow, Cheshire, United Kingdom )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Helenium」の詳細全文を読む スポンサード リンク
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