Key to the varieties of Diplusodon kielmeyeroides

1. Prophylls 1.5–2.0 mm long; floral tube 6.0– 6.5 mm long, thin, not fleshy; epicalyx segments 2–3 mm long, shorter than the sepals .................................................................................................... D. kielmeyeroides var. kielmeyeroides

1. Prophylls ca. 8 mm long; floral tube 9–10 mm long, more robust and fleshy; epicalyx segments 7–8 mm long, surpassing the sepals ..................................................................................................... D. kielmeyeroides var. macrocalyx