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In Canada, drooping-leaved beard-moss (Oxystegus recurvifolius) is found only on the west coast of Haida Gwaii in British Columbia (B.C.), at four extant known occurrences and one additional occurrence is possibly extirpated. This moss also occurs in Alaska (Adak Island) as well as England, Wales, Scotland, and Nepal. In British Columbia drooping-leaved beard-moss grows on cliff ledges, talus slopes, lake shores, and stream banks in two biogeoclimatic zones specific to Haida Gwaii: the Very Wet Hypermaritime subzone of the Coastal Western Hemlock zone (CWHvh3), and the Wet Hypermaritime subzone of the Mountain Hemlock zone (MHwh). The drooping-leaved beard-moss was designated as Endangered by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) in 2019. The species has a narrow physiological niche and grows only in extreme oceanic and highly humid climates. The main threats to the species are climate change (particularly at high elevation), landslides, introduced invasive Sitka Black-tailed Deer (Odocoileus hemionus sitkensis), and logging. It is not yet listed in Canada on Schedule 1 of the Species at Risk Act (SARA) (Government of Canada 2002). In British Columbia, the drooping-leaved beard-moss is ranked S1 (critically imperiled) by the B.C. Conservation Data Centre and is on the provincial blue list. The recovery goal for this species is to improve the resiliency and redundancy of extant Canadian populations, including any additional populations that may be identified in the future, by managing human-caused threats.
B.C. Ministry of Lands, Water and Resource Stewardship. 2022. Recovery Plan for the Drooping-leaved Beard-moss (Oxystegus recurvifolius) in British Columbia. Province of BC, Ministry of Lands, Water and Resource Stewardship. Management Plan (Species at Risk)
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