Published in Denkschriften der Akademie der Wissenshaften. Mathematisch-Naturwissenschaftlichen Klasse, in 1908, in volume 81, pages 389-446
Created: 2016-08-17, modified: 2016-08-17![](https://www.biodiversitylibrary.org/pagethumb/47817456,60,60)
Published in Madroño, in 2009, in volume 56, pages 66
Created: 2016-02-15, modified: 2016-02-15![](https://www.biodiversitylibrary.org/pagethumb/13700684,60,60)
Published in Archiv für Naturgeschichte, in 1856, in volume 22, issue 1, pages 163-205
Created: 2017-03-18, modified: 2017-03-18![](https://www.biodiversitylibrary.org/pagethumb/12698901,60,60)
Published in Contributions From The University of Michigan Herbarium, in 1980, in volume 14, pages 153-203
Created: 2016-07-11, modified: 2016-07-11![](https://www.biodiversitylibrary.org/pagethumb/1,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, pages 1
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506961,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506964,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, pages 1
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506963,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, pages 1
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506931,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1886, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506939,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1887, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506941,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1887, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506943,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1887, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506915,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1885, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506917,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1885, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506919,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1885, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506907,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1885, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506909,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1885, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506911,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1885, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506935,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1886, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506937,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1886, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506925,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1886, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506927,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1886, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506913,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1885, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506905,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506855,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1876, pages 1-4
Created: 2017-06-23, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506871,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1883, pages 1-4
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506875,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-4
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506879,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-4
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506887,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506889,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506891,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506893,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506859,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1876, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506863,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1881, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506899,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506901,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506865,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1882, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506867,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1883, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506895,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506897,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506885,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506883,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1884, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506945,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1887, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506947,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1887, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/36261888,60,60)
Published in Proceedings of The American Philosophical Society, in 1883, in volume 21, issue 114, pages 286-289
Created: 2017-01-01, modified: 2017-01-01![](https://www.biodiversitylibrary.org/pagethumb/53506929,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1886, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506933,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1886, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506921,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1886, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506923,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1886, pages 1-2
Created: 2017-06-24, modified: 2017-06-24![](https://www.biodiversitylibrary.org/pagethumb/53506869,60,60)
Published in John Ball letters to Asa Gray, 1876-1888, in 1883, pages 1-2
Created: 2017-06-24, modified: 2017-06-24