When I bought my house, there was this blue flower growing in partial
shade, dry soil... it's behaved like a perennial, but in this part of
Texas, a lot of plants that are annuals survive the winter. The
flowers have four petals, pale blue, and it grows as sort of a ground
hugging vine (but very slow-growing, maybe because of the shade/dry
soil, or that it grows beneath an oleandar?)

Unfortunately, my well-meaning brother didn't notice it there because
it wasn't in flower and raked it up while getting ready for Halloween
trick-or-treaters! I don't know if he got the root or not, but if I
can identify it, I'd like to plant some more... it's a charming little
plant and looks great growing over the landscaping rocks...

I've done countless web-searches, browsed most of the Lady Bird
Johnson flower database... and come up short...

I would be eternally greatful if someone could give me a clue:

http://gotmama.com/flower.html


Kind regards,
GigglesMom