seems like my experiments drying out u. machrorhiza (western populations of u. vulgaris) are just forming turions... coming to the conclusion that these may be non-flowering specimens. no matter! I hear of sightings within walking distance of my house, so a hunting we shall go!
Utricularia macrorhiza
Believe it’s water temperature and obviously long days that triggers flowering, all I seen in bloom have been growing floating in water that doesn’t change level with the seasons.