Notes on Arctic Uredinales
1928; Taylor & Francis; Volume: 20; Issue: 1 Linguagem: Inglês
10.1080/00275514.1928.12016897
ISSN1557-2536
Autores Tópico(s)Yeasts and Rust Fungi Studies
Resumoplants brought back from northwestern Greenland in the Danish Jubilee Expedition of 1920-23 have been critically searched for micromycetes by Mr. J. Lind, resulting in the detection of 80 species, 5 of them being Uredinales. Mr. Lind has made his report in No. 2 of the account of the expedition (1926) and takes occasion to revise some of the taxonomy involved. As to the rusts it is only required to state here that the writer agrees entirely with the conclusions, except in the case of Puccinia Thlaspeos, which he believes to be quite distinct from P. Holboellii. characters of the two species are given in volume 7, page 532, of the North American Flora, a publication, by the way, that is not mentioned in the literature cited. In a later work, The Geographical Distribution of Some Arctic Micromycetes, 1927, Mr. Lind has made a highly important contribution to the subject of plant dissemination in high northern latitudes. He points out that the strong wind of the region may carry seeds, fragments of stems and leaves for long distances over the surface of snow and ice, often depositing them in crevices or valleys where conditions are favorable for growth upon return of warm weather. For nine months of the year ice bridges the waters between islands and even the continents, so that the winds may sweep parts of flowering plants with the endophytes living upon them over a smooth dry surface in a circumpolar migration, even over such long stretches as between Greenland, Norway, Nova Zembla and Spitzbergen. This deduction is supported by citations from the writings of a number of arctic travelers. In all probability the agency of the wind is the chief, if not the only, agency for the dispersal of plants and their parasites in arctic regions, a conclusion which seems logical. It is also pointed out that the most common arctic rusts are short-cycle species, like Puccinia Arenariae, P. Holboellii, P.
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