someone here always knows the answer....G

....today i visited a garden located in the Pacific North West,
Canada....i saw a flower new to me and am trying to identify it..it is a
real *true* rich blue - like a gentian....the shape of the flower is
somewhat like a single snapdragon, but with a longer more taperd shape and
is about an inch or so long..there are several spaced individually along
the upper stem, not in a cluster..the plant is about 18 inches tall

..the stem is square and green not woody.....the leaves remind me of mint
and are aromatic ...dont know if it is annual or perrenial...

anyone have any ideas?...i have exhausted my resources

thanks!

murphy, mystefied....