| 词条 | Tithonia rotundifolia |
| 释义 |
|name = Red sunflower |image = Tithonia rotundifolia, blomhoof, Groenkloof NR.jpg |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |genus = Tithonia |species = T. rotundifolia |binomial = Tithonia rotundifolia |binomial_authority = (Mill.) S.F. Blake}} The red sunflower or Mexican sunflower (Tithonia rotundifolia (Mill.) S.F. Blake[1]) is a plant in the Asteraceae family, which is native to the warmer and moister parts of North America. RangeIt occurs in Florida, Louisiana, Mexico, Central America and the West Indies. Outside its native region it is sometimes grown as an ornamental and has become naturalized in some of these locales. In Africa it has been recorded up to an altitude of 1,580 m above sea level.[2] DescriptionPlants are perennial in the native habitat, up to 4 m tall with orange or red flowers. In USDA zones cooler than Zone 10 it is an annual. Leaves, despite the epithet, are deltoid to lanceolate, occasionally lobed.[3] Synonyms
References1. ^Blake, Contributions of the Gray Herbarium 52: 41. 1917 {{Taxonbar|from=Q2176037}}2. ^{{cite web |last1=Hyde |first1=Mark |title=Tithonia rotundifolia (Mill.) S.F. Blake |url=http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=160470 |website=Flora of Zimbabwe |accessdate=7 June 2016|display-authors=etal}} 3. ^Flora of North America, vol 21, p 39. 2006. 4. ^Miller, Garden Dictionary ed. 8, Tagetes no. 4. 1768. 5. ^Hooker, Botanical Magazine 61, t 3295. 1834. 6. ^A.H.R. Griesbach. 1866. Catalogus plantarum cubensium. 7 : Heliantheae|Flora of Mexico|Garden plants of Central America|Flora of Florida|Flora of Louisiana|Flora of Central America|Flora of Cuba |
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