× Pucciphippsia vacillans

× Pucciphippsia vacillans is a member of the nothogenus × Pucciphippsia, formed by the hybridization of Phippsia and Puccinellia. It is a small, perennial grass, which is native to the arctic and grows well in wet conditions. × Pucciphippsia vacillans is entirely sterile, polyploid, and can only be formed as a product of hybridization. There has been difficulty in defining × Pucciphippsia vacillans parent species, and this may be representative broader difficulties in understanding species delineations and phylogenetics among arctic flora.