The illustration of Corydalis micrantha ssp. australis shows the 'spurs' to have a slightly downwards bend, those on the plant you show appear to be more straight which would indicate Corydalis micrantha is more likely.
http://luirig.altervista.org/c...
http://www.efloras.org/florata...
http://www.theplantlist.org/tp...
The description of the subsp. australis on Flora of North America does seem to fit apart from the stems which don't appear to be weak:
Stems usually weak. Inflorescences : racemes of chasmogamous flowers often greatly exceeding leaves, elongate; petal spur blunt, not globose at apex. Capsules slender, commonly 15-20 mm.
http://www.efloras.org/florata...
Location is OK. ..
http://www.efloras.org/object_...
Corydalis micrantha subsp. micrantha (which I would take as the 'straight' species):
Inflorescences : racemes of chasmogamous flowers not greatly exceeding leaves, often short; petal spur ± globose at apex. Capsules often stout, commonly 10-15 mm.
http://www.efloras.org/florata...
The question is, what would constitute "greatly exceeding leaves"? The flowers do look to rise well above the leaves, but can they rise even more?
Whether or not it is a subspecies, it would still fit into the straight species category.
