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Twenty-five North American lichens are issued in this exsiccat series, numbers 151-175. In this fascicle, collections were made from nine states, including: Alaska (1), Arizona (3), California (2), Colorado (6), Idaho (1), Montana (4), Nevada (2), New Mexico (4), and Utah (2). Here, Thamnolia subuliformis (Ehrh.) W. L. Culb. (No. 173) is reported as a new species record for Utah.
One of Canada's rarest lichens, Heterodermia leucomela (L.) Poelt, was first discovered in Belleville, Ontario by George Lawson in 1862. Thought to be extirpated in Ontario, it is known from fewer than a dozen records in Canada, with only a few discoveries in northeastern North America in the past 100 years. My discovery in 2018 is of historical significance and provides hope that microhabitats or refugia required for presumed extirpated species may still exist in highly disturbed landscapes in southern Ontario.
This article chronicles the Montana history of moss exploration, notes on biogeographical distributions, and a checklist of documented moss taxa from 1880 to 2018. Montana has 522 unique moss taxa represented at the species, subspecies, and variety levels by 488, 8, and 26 taxa respectively. This checklist is a revision to the second preliminary moss checklist (Elliott 1993), which listed 408 taxa.
Examination of over 150 Norris 1964 collections from the Dominican Republic includes one moss, Solmsiella biseriatum (Aust.) Steere and many hepatics of which Lejeuneaceae are listed. A new Antillean record first determined as Diplasiolejeunea involuta Winkler of Central America is now reduced to synonymy under the South American Diplasiolejeunea pauckertii (Nees) Steph.
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