[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/helianthus-debilis-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki24\/helianthus-debilis-wikipedia\/","headline":"Helianthus debilis – Wikipedia","name":"Helianthus debilis – Wikipedia","description":"before-content-x4 From Wikipedia, the free encyclopedia after-content-x4 Species of sunflower Helianthus debilis is a species of sunflower known by the","datePublished":"2017-06-21","dateModified":"2017-06-21","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/e\/ef\/Miami_Beach_-_Sand_Dunes_Flora_-_Sea_Grapes_and_Dune_Sunflowers_01.jpg\/120px-Miami_Beach_-_Sand_Dunes_Flora_-_Sea_Grapes_and_Dune_Sunflowers_01.jpg","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/e\/ef\/Miami_Beach_-_Sand_Dunes_Flora_-_Sea_Grapes_and_Dune_Sunflowers_01.jpg\/120px-Miami_Beach_-_Sand_Dunes_Flora_-_Sea_Grapes_and_Dune_Sunflowers_01.jpg","height":"120","width":"120"},"url":"https:\/\/wiki.edu.vn\/en\/wiki24\/helianthus-debilis-wikipedia\/","about":["Wiki"],"wordCount":2840,"articleBody":"     (adsbygoogle = window.adsbygoogle || []).push({});before-content-x4From Wikipedia, the free encyclopedia       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Species of sunflowerHelianthus debilis is a species of sunflower known by the common names cucumberleaf sunflower, beach sunflower, weak sunflower,[2] and East Coast dune sunflower.[3] It is native to the United States, where it can be found along the Atlantic and Gulf Coasts.[4] It is known elsewhere as an introduced species, such as South Africa, Australia, Taiwan, Slovakia, and Cuba.[5]       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4This species may be an annual or perennial herb.[4] It is usually perennial but it may last only one season in climates where freezes occur.[6] It can reach a height of 2 meters. The stem grows from a taproot and may grow erect or decumbent.[4] It can also spread along the ground, becoming a dense groundcover.[6] The leaves are usually arranged alternately and are variable in shape and size. The largest are up to 14 centimeters long by 13 wide. The showy inflorescence is a single flower head or an array of two or three heads. There are up to 30 lance-shaped phyllaries each up to 1.7 centimeters long. There are up to 20[4] or 21[7] ray florets, each up to 2.3 centimeters long. They are usually yellow in the wild, but cultivars have been bred to bear whitish,[7] reddish, or orange florets.[6] The center of the head is filled with many red, yellowish,[4] or purplish[7] disc florets. The fruit, a cypsela, is roughly 2 or 3 millimeters long.[4]There are several subspecies. At one point there were eight.[8] Five are currently recognized.[1][4]This species grows in several types of coastal habitat, sometimes directly on the beach. It tolerates a moderately saline environment, but not an excessive amount of salt spray or inundation.[20] It is highly drought-tolerant and it will grow in low-nutrient and poor soils, such as alkaline and acidic soils and sand.[6][7] The plant attracts butterflies and birds feed on the fruits.[6]This plant is used as a garden flower. It is also good for landscaping, especially in poor, dry soils. It is planted on beaches, where it forms a sand-binding groundcover that prevents erosion and stabilizes dunes.[21] It requires supplemental watering only rarely, if ever. It may get “ratty-looking” after the showy flowers have withered.[20] Available cultivars include ‘Italian White’,[7] ‘Flora Sun’,[21]‘Dazzler’, ‘Excelsior’, and ‘Orion’.[6]       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Gallery[edit]Dune Sunflowers growing in Miami Beach sand dunes (South Beach)Sea Grapes and Dune SunflowersReferences[edit]^ a b The Plant List, Helianthus debilis Nutt. ^ “Helianthus debilis“. Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 January 2018.^ Wunderlin, R. P. and B. F. Hansen. 2008. Helianthus debilis. Atlas of Florida Vascular Plants. Institute for Systematic Botany, University of South Florida, Tampa.^ a b c d e f g Helianthus debilis. Flora of North America.^ a b “Helianthus debilis subsp. cucumerifolius“. Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 January 2018.^ a b c d e f Gilman, E. F. and S. Park-Brown. Helianthus debilis Beach Sunflower. Environmental Horticulture, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. 1999. Revised 2007.^ a b c d e Christman, S. Helianthus debilis. Floridata.com. 1999. Updated 2003.^ Wain, R. P. (1983). Genetic differentiation during speciation in the Helianthus debilis complex. Evolution 37(6) 1119-27.^ Helianthus debilis ssp. cucumerifolius. Flora of North America.^ “Helianthus debilis subsp. debilis“. Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 January 2018.^ Helianthus debilis ssp. debilis. Flora of North America.^ “Helianthus debilis subsp. silvestris“. Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 January 2018.^ Helianthus debilis ssp. silvestris. Flora of North America.^ “Helianthus debilis subsp. tardiflorus“. Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 January 2018.^ Helianthus debilis ssp. tardiflorus. Flora of North America.^ Helianthus debilis ssp. tardiflorus. NatureServe.^ “Helianthus debilis subsp. vestitus“. Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 January 2018.^ a b Helianthus debilis ssp. vestitus. NatureServe.^ Helianthus debilis ssp. vestitus. Flora of North America.^ a b Gann, G. D., et al. 2005-2013. East Coast dune sunflower Helianthus debilis. Natives For Your Neighborhood. The Institute for Regional Conservation. Delray Beach, Florida, USA.^ a b Maura, C. and S. Sanders. Helianthus debilis ssp. debilis Plant Fact Sheet. USDA NRCS Brooksville Plant Materials Center. 2002.       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4"},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/helianthus-debilis-wikipedia\/#breadcrumbitem","name":"Helianthus debilis – Wikipedia"}}]}]