Published in Biol Bull, in 1914, in volume 26, pages 1-24
Created: 2010-01-06, modified: 2011-06-21![](https://www.biodiversitylibrary.org/pagethumb/1495437,60,60)
Published in Biol Bull, in 1939, in volume 77, pages 166-173
Created: 2010-01-06, modified: 2011-06-21![](https://www.biodiversitylibrary.org/pagethumb/938678,60,60)
Published in Biol Bull, in 1919, in volume 36, pages 149-166
Created: 2010-01-06, modified: 2011-06-21![](https://www.biodiversitylibrary.org/pagethumb/35238066,60,60)
Published in Botanical Gazette, in 1920, in volume 69, issue 1, pages 54-71
Created: 2017-03-14, modified: 2017-03-14![](https://www.biodiversitylibrary.org/pagethumb/41918312,60,60)
Published in Kungl. Svenska vetenskapsakademiens handlingar, in 1872, in volume 10, issue 4, pages 3-159
Created: 2015-03-12, modified: 2015-03-12