Known as "Tsuyukusa" (Monsoon Weed) in Japan, because it blooms during the rainy season. I only took this picture so I could print it and throw darts at it. One of the worst weeds in Tokyo.
Photo of plant in bloom (courtesy of Dave)
Invasive and marvelous blue dayflower from my garden. No copyright! Use it, please!
dayflower in my Los Angeles Back Yard
About 6 years after its last-noticed presence in my garden, this little blue-flowered weed re-appeared during the long hot summer of 2003!
Blue Dayflower in Japan, October 1992
Widow's Tears 2007
What a pretty little flower. =)
pretty, blue, lasts one day...but quite invasive
Asiatic blue dayflower with unusual striped leaves.
Variegated form of the Asiatic Dayflower
ASIATIC BLUE DAYFLOWER