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Pucciphippsia vacillans
Also called Svalbard Grass
× 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.
× Pucciphippsia vacillans is native to the arctic, an environment defined by freezing temperatures, permafrost, and long sunless winters. Relatively limited observations of it may be due to its scarcity or to its obscurity and the fact that in grows in parts of the world where there is very little human inhabitation. It was thought to be limited to Svalbard (Norway) and Novaya Zemlya (Russia), until it was observed on a variety of islands in Nunavut (Canada) and in Greenland (Denmark). The freezing climate of the arctic has defined and severely limited the evolution of arctic flora, but it is also warming at nearly twice the rate of the global average due to climate change which may impact the habitat and range of × Pucciphippsia vacillans in the future.
Text excerpted from the Wikipedia article × Pucciphippsia vacillans by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
