Margaret Sibella Brown | |
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| Born | March 2, 1866 Sydney Mines, Nova Scotia |
| Died | November 16, 1961 (aged 95) |
| Nationality | Canadian |
| Known for | Contributions to bryology |
| Awards | Master of Arts (honoris causa), Acadia University (1950) |
Margaret Sibella Brown (March 2, 1866 – November 16, 1961) was a Canadian bryologist specializing in mosses and liverworts native to Nova Scotia. Although lacking formal scientific training, she has been recognized for her contributions to bryology and as an authority on the mosses and liverworts of Nova Scotia. Samples she collected are now housed at major herbaria in North America and Europe.