Growing in our sandy bottomland. Alternate leaves with beautiful blue flossflower blooms. I'm thinking this is Gregg's Mistflower (Conoclinium greggii) but am uncertain and want to be sure before I post the photos to the DB.

The leaves don't look right for Gregg's mistflower.
Could it be Conoclinium coelestinum?

Gorgeous pictures!!!

Thanks Stone. You might be right on that. Let's invoke the name of @Horntoad and see if he can confirm or deny.

Look here for a dichotomous key:

http://www.efloras.org/florata...

(C. dissectum = C. gregii)

Just got home. I agree with stone, the leaves are not right for Conoclinium greggii, it is Conoclinium coelestinum . Conoclinium greggii is a synonym for Conoclinium dissectum, which grows in the western parts of the state. Conoclinium coelestinum grows in the eastern half of Texas including Cherokee County. Around here C. coelestinum tends to be found around ditches and other moist areas.

Fantastic, thank you all so much! I've imported the photos into Blue Mistflower (Conoclinium coelestinum)

That pastel blue has been a difficult colour to capture on film, for me... Which shows how long I've been trying...
On a cool autumn day, those electric pastels capture the eyes... to the exclusion of everything else...

I've tried photographing this plant for some time, actually. It's in a difficult location where there are a lot of shadows most of the time. Yesterday evening I down in the bottom, picking the last of our elderberries and the lighting was just right. It was overcast but light, so I set the ISO to 100, opened the aperture to f/5.6 and let the camera pick the exposure. I chose "Cloudy" as the white balance and these were the happy results.