hi Betty, wondering why Fumaria capreolata was rejected as an identification ? It is the only white Fumaria on the ACT Census, and matches the image on FloraVic online perfectly. Jane
Rosemary Purdie is a lot more expert than I am. She suggested Fumaria sp.
Fumaria bastardii can sometimes have white flowers.
Also, the diagnostic between capreolata and muralis is the relative length of the stalk to the flower cluster size. The stalk cannot be seen in these photos.