These Lobelia anceps leaves are very sparsely toothed along their margins. They are sporadically hairy, the longish hairs few and widely spaced.
Midribs and few lateral veins are slightly prominent on the dark green blades. A few white hairs are seen on the stems in picture, the longitudinal stem wings small (Manning, 2007; Pooley, 1998; iNaturalist; http://pza.sanbi.org).