With Scaevola (the darker blue flowers) below it.

Yes!! That's it - the web pictures show several variations, but this one definitely Looks like it should be in the aster family - I'm fond of wildflowers but have not run into this one before. Thank you for the help in identifying it, and I won't feel bad about offering some to my mother and sister now.

Another common name for that one is redstem filaree.

Well fascinating, Buglossoides arvensis (Corn Gromwell) is not native...but is at least apparently one of the richest natural plant-based sources of omega-3 SDA (stearidonic acid) known. Of which the body converts (SDA) to EPA at a rate of up to 30%, compared to a typical conversion rate of ALA (alpha-linolenic acid found in most plants) of 3-6%. So, it's essentially a surprising little superfood plant that carries many benefits, despite being an import.