Grimmia grevenii 1China, Heilongjiang, Wudalianchi National Park volcanos Grimmia grevenii 2Wudalianchi National Park volcanos, lavarock with bryophytes Grimmia grevenii 3Wudalianchi National Park, miles of volcanic rock Grimmia grevenii 4Wudalianchi volcanos Nat. Park with many clear water lakes Grimmia grevenii 5Wudalianchi volcano Nat. Park, lavarock scree on Mt. Huoshao, Jin Kou collecting Grimmia grevenii, August 1, 2011. Grimmia grevenii 6Grimmia grevenii, habitus in the field Grimmia grevenii 7dry vegetation Grimmia grevenii 8moistened vegetation Grimmia grevenii 9leaf Grimmia grevenii 10upper part of leaf Grimmia grevenii 11mid-leaf cells with various thickness of cell layers Grimmia grevenii 12basal part of leaf Grimmia grevenii 13basal part of leaf Grimmia grevenii 14Grimmia grevenii, young shoot, arising from the protonema Grimmia grevenii 15young shoot, detail Grimmia grevenii 16Grimmia grevenii, moistened stems Grimmia grevenii 17Bryological investigation of the Wudalianchi volcano Nat. Park, University of Hohhot, Inner Mongolia. Grimmia grevenii 18Prof. Xue-Liang Bai, expedition leader