Thinking of flowers ...

They do fade eventually ... so having pictures of them is always useful.
We've had a particularly beautiful arrangement of sunflowers in church recently ... I couldn't resist taking a few pictures!

These flowers are native to the Americas and there's evidence that they were domesticated almost three thousand years Before Christ (BC).  Seeds were brought to Europe in the sixteenth century.
They're useful plants both for human consumption (in the oils, roasted seeds and in flour); for animal feed and, there's even a use for the latex in a hypo-allergenic synthetic rubber!
This next sentence is taken from an article on sunflowers on the internet ...

A model for the pattern of florets in the head of a sunflower was proposed by H. Vogel in 1979.   It is a form of Fermat's spiral.   

 More information and the mathematical formulae may be found in various places if you're interested!  I find the pattern very pleasing!
Clearly they appealed to Vincent van Gogh too!  Here's another image from that infamous site, Wikipedia!

In front of that I could stand for hours!