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1800's 1810's 1820's 1830's 1840's 1850's 1860's 1870's 1880's 1890's
1900's 1910's 1920's 1930's 1940's 1950's 1960's 1970's 1980's 1990's
2000's

1
Pre-History    
5000BC Maize Grown in Mesoamerica for food.
1400's  Back  
1410's Aztec Earliest drawing of Dahlia used in symbolic reference to the Chief - proposed by Richard K.Cook
Dahlias used as headbands, mainly by women of Mixtec culture as part of matrimony and possibly Mextec (Aztec Culture) as well.
Ref: Richard K.Cook  
1420's
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1490's  
1492 Christopher Columbus starts out on his first voyage (August 1492 to March 1493)
1493 Christopher Columbus starts out on his second voyage (September 1493 to June 1496)
1498 Christopher Columbus starts out on his third voyage (May 1498 to November 1500)
1500's   Back  
1502 Christopher Columbus starts out on his fourth voyage (May 1502 to November 1504)
  Motecuzoma II becomes Aztec emperor
1510's  
1517 Hernández de Córdoba, lands at Catoche, Campeche and Chanpotón in the Yucatan peninsula, Mexico and is attacked by the Maya.
1519 Smallpox epidemic in the Spanish controlled Antilles.
  Hernan Cortés lands at Vera Cruz and later in November enters the Aztec capital of Tenochtitlan
1520's Smallpox epidemic in Tenochtitlan.
  Hernan Cortés has Motecuzoma II, Aztec emperor executed. Aztec capital, Tenochtitlan burnt to the ground and the Aztec nobles &priests are murdered.
1529 dahlia acocoxochitl Friar Bernardino de sahagún arrives in Mexico and would later write the first western account of the Dahlia (Acocoxochitl) 
1530's
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1600's  
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1760's  
1770's   
1780's   Martin de Sessé y Lacasta (Physician) moved to Mexico City.
1787 Nicholas Joseph Thierry de Menonville, see dahlias growing in Guaxaca Oaxaca
  Martin de Sessé y Lacasta (Physician) & Jose Mariano Mociño set out to collect plants for the Mexico's Botanical Garden
1789 French Revolution
  Either in 1789 or 1790 Martin de Sessé y Lacasta's colleague Vincente Cervantes, (Later Director of the Mexican Botanical Gardens) sent Dahlia seed to Madrid.
1790's    
  dahlia pinnata Dahlia pinnata 
1791 Abbe Cavanilles published "Icones et Descriptiones Plantarum" in which he dedicated the Genus Dahlia, to Andre Dahl, a Swedish botanist and named the multi ray plant that had been raised from the seed that Cervantes had sent, as Dahlia pinnata.
1795 Abbe Cavanilles published "Icones et Descriptiones Plantarum, Vol 3" in October, that adds two more Dahlia species,  Dahlia coccinea & Dahlia rosea
1800's   Back  
1801 Abbe Cavanilles becomes Director of Real Madrid Botanical Garden
1803 Britain at war with France
  John Frasier introduces Dahlia coccinea from France  John Woodford grows what is claimed to be Dahlia rosea  from France but is the first Garden Dahlia to be grown in Britain
1804 Britain declares war with Spain.
  Abbe Cavanilles dies in the May 1804
  Alexander Humboldt & Bonpland return home to France, from their voyage of exploration of South and Central America. They bring back seed of Dahlia coccinea.
  dahlia pinnata Lady Holland sends seed to Britain and this is the main bases for the beginning of garden Dahlias in Britain
1805 Battle of Trafalgar
  Lady Holland 's Librarian raises two seedlings from Lady Holland's Dahlia pinnata purpurea No 1.
  Alexander Humboldt sends to Wildenow (Berlin Botanical Garden, Germany) seed of Dahlia coccinea, that is germinated and flowered in 1805.
  Richard Salisbury (1761 - 1829) grows Dahlia plants for the first time
1806 Richard Salisbury (1761 - 1829) receives  Dahlia seed from Lady Holland's garden.
  John Wedgewood (1766 - 1844 ) founder of the Royal Horticultural Society grows Dahlia plants for the first time
1807  
1808 Madrid under French control.
  Richard Salisbury writes for the Horticultural Society (Later the Royal Horticultural Society) on the different species of Dahlia and the best method of  cultivation in Great Britain.
  John Wedgewood founder of the R.H.S writes about his achievements at growing Dahlias in Staffordshire for the Horticultural Society (Later the R.H.S) .
1810's  
1815 Battle of Waterloo, the end of Napoleons control of Europe
1818 First recorded exhibiting of dahlias in Scotland, receiving Silver Medal
1820's  
1830's  
1840's  
1846 The United States illegally goes to war with Mexico, due to American troops being fired upon by Mexican Army after they had entered Mexican territory illegally.
1848 The United States defeats Mexico and American troops occupy Mexico City.
1850's   Back  
1860's  
1861 The American Civil war begins.
1865 The American Civil War ends.
1870's  
1879  
1880's  
1881 dahlia yuarezii
1890's  
1900's   Back  
1910's  
1914 First world war begins.
1918 First world war ends on the 11th day of the 11 month.
1920's  
1930's  
1939 Second world war begins
1940's WW2 dahlia map
1945 Second world war ends.
1950's   Back  
1960's  
1969 Paul D Sørensen,  published in Rhodora,"Revision of the Genus Dahlia Asteraceae: Heliantheae-Coreopsidinae)".
1970's  
1980's  
1990's  
1995 dahlia hjertingii dahlia spectabilis
  Jen P.Hjerting, Paul Sørensen & Dayle Saar Jointly travel through Mexico collecting species Dahlias and add six more species to the list, Dahlia campanulata, Dahlia neglecta, Dahlia hjertingii, Dahlia cuspidata, Dahlia spectabillis, Dahlia parvibracteata    See Species Dahlias
2000's   Back