Species Profile

Porter's Twisted Moss

Scientific Name: Tortula porteri
Taxonomy Group: Mosses
Range: Ontario
Last COSEWIC Assessment: April 2016
Last COSEWIC Designation: Not at Risk
SARA Status: No Schedule, No Status


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PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. Most of the reports not yet available are status reports for species assessed by COSEWIC prior to May 2002. Other COSEWIC reports not yet available may include those species assessed as Extinct, Data Deficient or Not at Risk. In the meantime, they are available on request from the COSEWIC Secretariat.

1 record(s) found.

COSEWIC Status Reports

  • COSEWIC Assessment and Status Report on the Porter's Twisted Moss Tortula porteri in Canada (2016)

    Porter’s Twisted Moss (Tortula porteri) is part of the largely temperate moss family Pottiaceae. The leafy plants, which form thin turfs on calcareous rock surfaces, reach just 1 – 3 mm in height. They often bear erect, narrow, cylindrical spore capsules on stalks measuring up to 10 mm, which increases their detectability. Male and female reproductive structures are formed on separate plants. Porter’s Twisted Moss is distinguished from similar, related species by microscopic and chemical characteristics.