. "974928" . "Fr., 1874" . "481970" . "Polyporus nigricans f. trivialis Fr., 1874" . "Polyporus nigricans f. trivialis" . _:b76293824 . "Polyporus nigricans f. trivialis" . . _:b76293824 "481970" . _:b76293824 . . . . _:b76293824 . . . . _:b76293824 "Index Fungorum id" .