blue sowthistle

The weathermen are predicting Sahara temperatures for today,so once again, got up ridiculously early to enjoy the cool .
And also because Lazooligirl threw down the gauntlet yesterday!
But, once again ,am rather glad I did;this morning is gorgeous!
This is another pernicious weed that has invaded my garden ,growing 2 m tall and with these delicate blue flowers that shine in the morning sunlight.
And which has the most unglamourous of names.
Hopefully, someone will tell us of a more acceptable alternative!