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The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.

B. S. Walters

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Swamps and (less often) marshes, moist disturbed forests and thickets, ditches and weedy areas, lake shores and river banks.

Typical European plants are said to be usually if not always dioecious and to have broader ovate and definitely cordate leaf blades, which bear stinging hairs on both surfaces. Such plants are represented in Michigan only by a Houghton Co. collection (Lake Linden; O. A. Farwell 8513 in 1929, BLH, MICH). Most if not all of our plants are monoecious, have narrower, smoother leaves, and are the native subsp. gracilis (Aiton) Selander.

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