Gymnosiphon (yellowseed) is a genus of monocotyledonous flowering plants from the yam order. As all of the other members of the family in which the plant is placed (Burmanniaceae) Gymnosiphon is entirely myco-heterotrophic genus that does not contain chlorophyll and respectively does not perform photosynthesis.Gymnosiphon is distributed across the moist, tropical regions of Asia, America and Africa. The plant has very small size and thin stems.