Monographs Details: Polytrichastrum sexangulare (Flörke ex Brid.) G.L.Sm.
Authority: Smith, Gary L. 1971. Conspectus of the genera of Polytrichaceae. Mem. New York Bot. Gard. 21: 1-83.
Family:Polytrichaceae
Discussion:

Polytrichum sexangulare [Florke ex Hoppe, Bot. Tasch. Hoppe 1800: 150. 1800.] Brid, Jour. Bot. Schrad. 1800(1): 285. 1801.

Polytrichum norwegicum auct. mult, non Hedwig, Sp. Muse. 99. t. 22. f. 1-4. 1801.