Villarsia capensis, the Cape bogbean, grows in water or wet places. When growing in water the leaf and flowering stems elongate sufficiently for positioning the blades and blooms above the surface.
While the leaves are usually confined to basal tufts, some flower stems have cauline (up the stem) leaves that are sessile (stalkless) and reduced from the size they normally grow at the base.
The yellow flowers become about 1,2 cm in diameter, growing in branched panicles. The fruit is a capsule that has four valves (Bean and Johns, 2005; iSpot; JSTOR).