Riedera is a genus of fungi in the Helotiales order.
The relationship of this taxon to other taxa within the order is unknown (incertae sedis), and it has not yet been placed with certainty into any family.
[1] The genus name of Riedera is in honour of Johann Georg von Rieder (fl.
1825–36), who was a botanist (Mycology), he was also Manager of the (Kaiserlichen) Imperial Botanical Garden in Kamtschatka and plant collector.
[2] The genus was circumscribed by Elias Magnus Fries in Summa Veg.