tags: NYC, Upper West Side, Manhattan, flowers, nature, image of the day
Dahlia, Dahlia hybrid.
Photographed on Manhattan's Upper West Side
on West 81st street as I was walking to the post office.
Dahlias comprise a genus with at least 36 species of bushy plants that are native to the western regions of Central and South America. There are more than 20,000 named cultivars of these plants in captivity, which are the result of both hybridization and chromosomal duplication: Dahlias are octoploid -- possessing eight copies of each homologous chromosome, whereas most plants have only two copies of each chromosome.
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More like this
tags: NYC, Upper West Side, Manhattan, flowers, nature, image of the day
Dahlia, Dahlia hybrid.
Photographed on Manhattan's Upper West Side
on West 81st street as I was walking to the post office.
Image: GrrlScientist, 26 May 2009 [larger view].
Dahlias comprise a genus with at least 36…
tags: NYC, Upper West Side, Manhattan, flowers, nature, image of the day
Dahlia, Dahlia hybrid.
Photographed on Manhattan's Upper West Side
near the corner of West 81st street and Central Park West.
Image: GrrlScientist, 11 June 2009 [larger view].
The Dahlia comprise 36 species within a…
tags: NYC, Upper West Side, Manhattan, flowers, nature, image of the day
Marigold, Tagetes patula, although this is likely a hybrid.
Photographed on Manhattan's Upper West Side
on West 83rd street, across from the post office.
Image: GrrlScientist, 27 May 2009 [larger view].
Marigolds are…
tags: NYC, Upper West Side, Manhattan, flowers, nature, image of the day
Dahlia, Dahlia hybrid.
Photographed on Manhattan's Upper West Side
on Columbus Avenue between West 81st and West 82nd streets.
Image: GrrlScientist, 20 June 2009 [larger view].
Ooh look! There's an aphid trampling all over it with its big boots.
>>Dahlias are octoploid -- possessing eight copies of each homologous chromosome, whereas most plants have only two copies of each chromosome.
Actually hybridization and polyploidy is a fairly common, and very well documented, speciation mechanism in plants. Some people estimate that up to 70% of plant species may be polyploid.