I don't know, but you might be able to find it on the Lady Bird Johnson website.

I bet you saw Hydrolea ovata--"Blue Waterleaf". It tolerates/ needs wet ground and can be in shallow water for long periods of time.
The first time I saw this plant up close was the last time I " grabbed it" --- those spines will get you.!

David

The description of this blue flower was so intriguing that I kept checking back to see if anyone ID'd it so was glad to see David's answer. . A photo of Blue Waterleaf/Hydrolea ovata is on the Wildflower Center website.

I can see a family resemblance to the native waterleaf I grew in Illinois (Hydrophyllum virginianum), but no spines grew out of that flower!

Annie at the Transplantable Rose

Here is a link that might be useful: Hydrolea ovata

Yes David,

thank you so much. I am wondering if this flower has any value in a manicured garden, it was rather beautiful!