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Because climate change is becoming an increasingly urgent concern, it is important to understand its diverse effects on the natural world. These impacts are often particularly noticeable at the edge of the natural ranges of species. The first article in this issue studies the impact of climate change on an isolated black spruce stand at the southernmost extent of its range in southern Michigan. The authors conclude that the projected trajectory of its development does not track that of similar stands further north within the main range of the species.

The effect of environmental factors on a local biota is also the subject of the study reported in the second article, but with a different emphasis. In this case, the effect of microhabitat factors on communities of lichens and bryophytes, such as the identity and size of their host tree, the directional location of individuals on the host, and the presence of other epiphytes, is studied.

The Great Lakes Botanist, as well as its predecessor, The Michigan Botanist, has long been an important publisher of local floras in the Great Lakes area. As time passes and as further exploration is undertaken, older floristic studies become outdated, and updates become essential to maintain the current status of our knowledge. It is therefore with pleasure that we publish a set of additions, by Thomas L. Eddy, to a flora of Green Lake County, Wisconsin, that he published in these pages 22 years ago, in 1996.

Not only are local floras subject to continued exploration, but individual new finds add to our knowledge of the regional flora as a whole. For that reason, the Noteworthy Collections feature of this journal has been, and continues to be, an important source of such new knowledge. This issue features three Noteworthy Collections articles that provides new information about the distribution of six species in the Great Lakes region, all but one native to areas of the Old World, and one with a primary distribution in the southern portion of the United States that has recently been discovered for the first time in Ohio and Michigan.

—Michael Huft