In article ,
 Jeffrey Turner  wrote:

> I have noticed the existence of stemless dandelions, ostensibly driven
> by the advantage of being lower than lawn mower blades.  Has this
> phenomena been published?  I'm neither a botanist nor biologist and am
> curious about this, can anyone give me some information?  Thanks.
> 
> --Jeff

Possibly individual adaptation - longer grass means it has to grow 
further to release its seeds, but in trimmed lawns it doesn't need to. 
Basically, when it hits the full sun, it will seed:

http://www.geocities.com/naturenotes/dandy.htm

-- 
John Wilkins
john_SPAM{at}wilkind.id.au  www.wilkins.id.au
It is not enough to succeed. Friends must be seen to have failed.
                                                    Truman Capote
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