The rhizoid-tuber-bearing mosses, Bryum tenuisetum and B. violaceum, have been found on Nantucket Island, Massachusetts, on acidic sandy soil in areas of anthropogenic disturbance. Neither one has evidently been reported before for New England, and they are known only from a few places elsewhere in eastern North America. The plants of B. violaceum had strongly papillose rhizoids (vs. smooth according to descriptions of plants from elsewhere) but agree with other collections in various diagnostic characteristics. Plants in both collections were without sporophytes, which is typical of these dioicous bryums.

Stigmidium xanthoparmeliarum and Weddellomyces xanthoparmeliae are reported new to California and North America. Lichenostigma amplum and L. bolacinae are reported new for California and North America north of Mexico.

The commercial harvest of forest mosses and liverworts is an international, multimillion dollar industry with a potential ecological impact extending beyond the degradation of the slow-growing moss communities themselves. It is therefore important to develop guidelines for sustainable harvest, which may be preferable to complete prohibition. We present here guidelines (originally developed for the International Association of Bryologists) for policy makers, land managers, and harvesters based on moss harvest studies and input from bryologists, ecologists, nontimber forest product specialists, land managers, and commercial moss harvesters and buyers. Policy guidelines include standardizing reporting requirements, requiring the tumbling of moss before export, and creating incentives for buyer and harvester participation. Management guidelines include promoting salvage harvest, conducting inventories, and developing harvest guidelines in cooperation with local harvesters. Harvest guidelines, which must be region-specific, should cover the where, what, and how of sustainable harvest.

Leptogium millegranum, Placidium arboreum, Ramalina willeyi, and Stereocaulon pileatum represent new or recent records for Rhode Island's macrolichen flora.

Santessoniella crossophylla is reported from scattered localities in the Appalachian Mountains and Canadian Maritime Provinces of eastern North America.

This manuscript provides additional information about the bryophyte flora of the Bartlett Arboretum Forest published earlier this year in Evansia 25(1).