Microdon polygaloides leaves are linear, the blades flat although narrow or very slightly channelled, the margins entire and slightly thickened. The leaves spread or curve up, the tips pointed, some bluntly. There is tapering to short or debatable petioles.

Small secondary leaves have emerged as new growth on the stem in picture from the axils. No hairiness is detected (Leistner, (Ed.), 2000; iNaturalist).