Utricularia minor!
Well heavens, this was easy! Shortly after circling the shoreline to the sedge mat (and taking a shortcut across
the corner of the lake by walking over the length of a convenient beaver dam), I found Utricularia minor plants
clustered in openings among the grasses. First I only found leafy stolons
in vigorous growth, then I found these plants in flower.
Very nice! For scale, bear in mind these flower stalks are only about 5 cm (2 inches) tall. Taking photographs with a
tripod just a few cm above the water is a very moist process.
Here is a view looking downwards on the plant.
The very attentive student of Utricularia might be distracted by the interesting foliage in the
field of view (which is not U. minor).
I had only seen U. minor in flower once before, ironically
just a few days earlier in California!