Published in Journal of The Arnold Arboretum, in 1963, in volume 44, issue 4, pages 411-420
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/26840475,60,60)
Published in Annals of the Missouri Botanical Garden, in 1926, in volume 13, pages 1-34
Created: 2010-01-08, modified: 2016-12-29![](https://www.biodiversitylibrary.org/pagethumb/15997477,60,60)
Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 1-8
Created: 2010-01-08, modified: 2015-12-16![](https://www.biodiversitylibrary.org/pagethumb/15997485,60,60)
Published in Annals of the Missouri Botanical Garden, in 1928, in volume 15, pages 9-90
Created: 2010-01-08, modified: 2015-12-16![](https://www.biodiversitylibrary.org/pagethumb/627855,60,60)
Published in Rhodora, in 1962, in volume 64, issue 759, pages 195-200
Created: 2014-06-16, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/8370013,60,60)
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 4, pages 403-408
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8103296,60,60)
Published in Journal of The Arnold Arboretum, in 1937, in volume 18, issue 2, pages 118-129
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/9177280,60,60)
Published in Journal of The Arnold Arboretum, in 1962, in volume 43, issue 4, pages 351-358
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/625861,60,60)
Published in Rhodora, in 1957, in volume 59, issue 698, pages 36-38
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/8106486,60,60)
Published in Journal of The Arnold Arboretum, in 1932, in volume 13, issue 2, pages 145-179
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8369662,60,60)
Published in Journal of The Arnold Arboretum, in 1939, in volume 20, issue 1, pages 64-72
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8105265,60,60)
Published in Journal of The Arnold Arboretum, in 1935, in volume 16, issue 3, pages 347-352
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8371207,60,60)
Published in Journal of The Arnold Arboretum, in 1952, in volume 33, issue 2, pages 188-191
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8371866,60,60)
Published in Journal of The Arnold Arboretum, in 1951, in volume 32, issue 4, pages 403-408
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8371717,60,60)
Published in Journal of The Arnold Arboretum, in 1951, in volume 32, issue 3, pages 256-262
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/16046808,60,60)
Published in Annals of the Missouri Botanical Garden, in 1938, in volume 25, pages 299-359
Created: 2010-01-08, modified: 2015-12-16![](https://www.biodiversitylibrary.org/pagethumb/9181304,60,60)
Published in Journal of The Arnold Arboretum, in 1963, in volume 44, issue 4, pages 421-433
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8440848,60,60)
Published in Journal of The Arnold Arboretum, in 1947, in volume 28, issue 1, pages 1-98
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8436506,60,60)
Published in Journal of The Arnold Arboretum, in 1956, in volume 37, issue 2, pages 153-159
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8442249,60,60)
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 426-429
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8441935,60,60)
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 1, pages 112-113
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/9181317,60,60)
Published in Journal of The Arnold Arboretum, in 1963, in volume 44, issue 4, pages 434-435
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8371578,60,60)
Published in Journal of The Arnold Arboretum, in 1951, in volume 32, issue 2, pages 123-138
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8442086,60,60)
Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 3, pages 263-275
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8105857,60,60)
Published in Journal of The Arnold Arboretum, in 1933, in volume 14, issue 1, pages 1-52
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8106740,60,60)
Published in Journal of The Arnold Arboretum, in 1932, in volume 13, issue 4, pages 385-409
Created: 2016-07-07, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/52155200,60,60)
Published in The Wilson Bulletin, in 1942, in volume 54, issue 2, pages 121-131
Created: 2016-12-04, modified: 2016-12-04![](https://www.biodiversitylibrary.org/pagethumb/607756,60,60)
Published in Rhodora, in 1940, in volume 42, issue 504, pages 524-525
Created: 2014-06-16, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/602731,60,60)
Published in Rhodora, in 1932, in volume 34, issue 399, pages 41-48
Created: 2014-06-16, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/569355,60,60)
Published in Rhodora, in 1917, in volume 19, issue 221, pages 92
Created: 2016-07-19, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/587673,60,60)
Published in Rhodora, in 1925, in volume 27, issue 317, pages 73-76
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/603484,60,60)
Published in Rhodora, in 1934, in volume 36, issue 421, pages 1-7
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/601257,60,60)
Published in Rhodora, in 1930, in volume 32, issue 381, pages 185-186
Created: 2014-06-16, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/600088,60,60)
Published in Rhodora, in 1928, in volume 30, issue 353, pages 105
Created: 2014-06-16, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/567421,60,60)
Published in Rhodora, in 1913, in volume 15, issue 178, pages 187-188
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/693417,60,60)
Published in Rhodora, in 1914, in volume 16, issue 184, pages 77
Created: 2016-07-19, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/587828,60,60)
Published in Rhodora, in 1925, in volume 27, issue 324, pages 211-212
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/603772,60,60)
Published in Rhodora, in 1934, in volume 36, issue 427, pages 261-264
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/608997,60,60)
Published in Rhodora, in 1942, in volume 44, issue 526, pages 407
Created: 2016-07-19, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/47825624,60,60)
Published in Madroño, in 1947, in volume 9, issue 1, pages 17-20
Created: 2016-02-15, modified: 2016-07-07![](https://www.biodiversitylibrary.org/pagethumb/8373581,60,60)
Published in Journal of the Arnold Arboretum, in 1942, in volume 23, pages 231-232
Created: 2011-01-26, modified: 2023-02-16![](https://www.biodiversitylibrary.org/pagethumb/15646778,60,60)
Published in Copeia, in 1917, in volume 47, pages 76
Created: 2013-03-07, modified: 2013-03-08![](https://www.biodiversitylibrary.org/pagethumb/618732,60,60)
Published in Rhodora, in 1950, in volume 52, issue 621, pages 215-218
Created: 2014-06-16, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/618800,60,60)
Published in Rhodora, in 1950, in volume 52, issue 623, pages 279
Created: 2014-06-16, modified: 2016-07-26![](https://www.biodiversitylibrary.org/pagethumb/24733904,60,60)
Published in Smithsonian miscellaneous collections, in 1934, in volume 91, issue 12, pages 1-6
Created: 2013-05-14, modified: 2013-05-14![](https://www.biodiversitylibrary.org/pagethumb/566150,60,60)
Published in Rhodora, in 1911, in volume 13, issue 148, pages 70
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/563593,60,60)
Published in Rhodora, in 1908, in volume 10, issue 117, pages 164-167
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/567208,60,60)
Published in Rhodora, in 1912, in volume 14, issue 168, pages 234-235
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/569670,60,60)
Published in Rhodora, in 1918, in volume 20, issue 234, pages 115
Created: 2016-07-19, modified: 2016-07-19![](https://www.biodiversitylibrary.org/pagethumb/587507,60,60)
Published in Rhodora, in 1924, in volume 26, issue 309, pages 178-179
Created: 2016-07-19, modified: 2016-07-19