琉球アサガオより、江戸アサガオの開花期のほうが短いです。この紫色の花はほとんど枯れています。
The Edo morning glory doesn’t have a long season like the perennial Okinawa version. You can see this bloom is already starting to wither.
Purple Edo morning glory is elegant and short-lived
Tokyo Green Space
an unexpected view of the world's largest city
Tokyo Green Space 
So pretty!