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A single herbarium specimen from Banks Island in the Canadian National Herbarium, Ottawa, is closest to Puccinellia wrightii ( Puccinellia sect. Pseudocolpodium ). This would represent a species new to Canada and an extension of over 1100 km from the previously known range in NW Alaska and NE Russia. The morphological characteristics of this specimen are compared with all taxa in P . section Pseudocolpodium and the North American P. arctica aggregate. Principal components analysis supports placement of this specimen in P . section Pseudocolpodium near P. wrightii , where it contributes to a morphological continuum between this species and P. vahliana . The new combination Puccinellia wrightii var. flava is made and a map of the current known distribution of the species in P . section Pseudocolpodium is presented.

canadian field-naturalist

Addition to the Flora of Canada? A Specimen from the Arctic Archipelago, Northwest Territories Links Two Allopatric Species of Alkali Grass, &lt;em&gt;Puccinellia&lt;/em&gt;