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Describe the plant here... {{Inc| Helenium (possibly from Helenus, the son of Priam, but there is no clear record of the application of the name). Compositae. Sneeze Weed. Hardy annual and perennial herbs, bearing yellow flowers from early summer to late autumn; only the perennials are in cultivation. Stem erect, usually branching above: lvs. alternate, narrowly to broadly lanceolate, entire or toothed, glandular-dotted; the frequently decurrent petiole and st. sometimes winged: heads solitary or corymbose, yellow or brownish; disk-fls. perfect, fertile, their corollas 4-5-toothed; the ray-fls. pistillate or neutral, the rays wedge-shaped, 3-5-lobed. — About 30 species, N. Amer., Mex. Closely resembles Helianthus, but differs in having elongated, often top-shaped frs., which are never compressed and are usually silky villose; while the frs. of Helianthus are generally more or less 4- sided and are smooth. In Helenium the receptacle is naked; in Helianthus it bears paleaceous bracts. Heleniums thrive best in a rich, moist soil, with a sunny aspect, and are propagated by seeds, cuttings or division. All the species are very easily grown, the only serious difficulty being a white aphis which sometimes attacks the roots. If plants look unhealthy they should be lifted, washed with an insectiside and reset in a new place. The commonest species in cult, is H. autumnale, put perhaps the most valuable species for general planting is H. hoopesii, which is one of our earliest blooming composites, and is also desirable for the border or for cut-flowers. H. hoopesii, H. bolanderi and H. autumnale will give bloom in succession from May to October. The first two are also attractive when grown in pots, but they do not flower from seed the first year, either in pots or in the open.}} ==Cultivation== <!--- Type cultivation info below this line, then delete this entire line --> ===Propagation=== <!--- Type propagation info below this line, then delete this entire line --> ===Pests and diseases=== <!--- Type pest/disease info below this line, then delete this entire line --> ==Species== H. douglasii, Hort.=Monolopia major.—H. tenuifolium, Nutt. Annual. A weed in the S. Atlantic and southwestern states. St. 8 in. to 2 ft. high, very leafy: lvs. thread-like, entire, sessile, often whorled. Va., Fla., west to Mo. and Texas.{{SCH}} ==Gallery== {{photo-sources}}<!-- remove this line if there are already 3 or more photos in the gallery --> <gallery> Image:Upload.png| photo 1 Image:Upload.png| photo 2 Image:Upload.png| photo 3 </gallery> ==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== *{{wplink}} {{stub}} __NOTOC__
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