Rachis and pedicels lanuginose or tomentose; bracts orbicular-ovate, 5–7 mm, both surfaces densely sericeous; calyx adaxially densely sericeous; leaf base subcordate.
In the spring Utricularia warburgii produces 5-20 cm. flower scapes bearing 2-6 violet-blue flowers, 8mm in size and bearing a yellow splotch at the throat.