| Literature | Kingman 1912; Harthill et al. 1979; Koch 1950a; Koch and Ikenberry 1954; Lesquereux 1868; Long 1978; Mishler 1978; Sullivant 1856; Thomson and Ketchledge 1958; Toren 1977. As Gymnostomum calcareum var. perpusillum Brandegee 1891; Lesquereux and James 1884; Watson 1880. As Gymnostomum aeruginosum Crum and Anderson 1981; Kellman 2003; Lawton 1971; Shevock and Toren 2001; Showers 1982; Spjut 1971; Stark and Whittemore 1992; Toren 1977; Zander 1977a. |
| Illustrations | Malcolm et al. 2009 p. 130; Crum and Anderson 1981; Smith 1978. |
| Notes | Although generally treated within the circumscription of Gymnostomum aeruginosum by some authors, plants attributed to G. calcareum are ecologically and morphologically distinctive based on our field experience. All California Gymnostomum collections examined are G. calcareum. |
| Bioregions | CaR, CW, DMoj, DSon, NW, SN, SW. |
| Vouchers | Humboldt Co.: near Trinidad Bay, Duell s.n. (UC); Monterey Co.: Pinnacles, Hunter-Liggett Military Reservation, Norris 87277; Sonoma Co.: Cedars north of Cazadero, headwaters of Big Austin Creek, Ertter & Raiche 12862 (UC); Tehama Co.: bluff overlooking Battle Creek near Manton, Norris 21339; Trinity Co.: Highway 299, 0.25 miles east of Del Loma, Shasta-Trinity National Forest, Silver 882 (UC); Tulare Co.: Highway 190, 1.7 miles west of Pierpoint Springs, Middle Fork Tule River, Sequoia National Forest, Shevock 10142 and Kaweah River below Ash Mountain Headquarters, Sequoia National Park, Shevock & Whitmarsh 17023. |
| keyimagelink(25%) | http://herbaria4.herb.berkeley.edu/drawings/GyCaIreland8837.gif caption: drawing by Montalvo of Ireland 8837 |
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