Published in The Wilson Bulletin, in 1966, in volume 78, issue 3, pages 301-308

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Published in The Wilson Bulletin, in 1960, in volume 72, issue 3, pages 238-243

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Published in Journal of the Arnold Arboretum, in 1966, in volume 47, pages 266-269

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Published in Journal of The Arnold Arboretum, in 1954, in volume 35, issue 2, pages 87-133

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Published in Journal of The Arnold Arboretum, in 1931, in volume 12, issue 4, pages 296-308

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Published in Journal of the Arnold Arboretum, in 1975, in volume 56, pages 398-412

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Published in Journal of The Arnold Arboretum, in 1946, in volume 27, issue 2, pages 234-252

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Published in Journal of The Arnold Arboretum, in 1954, in volume 35, issue 2, pages 167-188

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Published in Journal of The Arnold Arboretum, in 1932, in volume 13, issue 4, pages 447-463

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Published in Journal of The Arnold Arboretum, in 1969, in volume 50, issue 1, pages 138-152

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Published in Hedwigia, in 1871, in volume 10, pages 109

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Published in Journal of The Arnold Arboretum, in 1945, in volume 26, issue 1, pages 85-92

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Published in Hedwigia, in 1872, in volume 11, pages 95-96

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Published in Hedwigia, in 1871, in volume 10, pages 60-61

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Published in Journal of The Arnold Arboretum, in 1936, in volume 17, issue 4, pages 370

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Published in Journal of The Arnold Arboretum, in 1943, in volume 24, issue 4, pages 501

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Published in Journal of The Arnold Arboretum, in 1941, in volume 22, issue 4, pages 598

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Published in Journal of The Arnold Arboretum, in 1957, in volume 38, issue 4, pages 404

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Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 4, pages 522

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Published in Journal of The Arnold Arboretum, in 1961, in volume 42, issue 4, pages 468

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Published in Journal of The Arnold Arboretum, in 1944, in volume 25, issue 4, pages 501

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Published in Journal of The Arnold Arboretum, in 1960, in volume 41, issue 4, pages 446

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Published in Journal of The Arnold Arboretum, in 1956, in volume 37, issue 4, pages 403

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Published in Journal of The Arnold Arboretum, in 1958, in volume 39, issue 4, pages 514

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Published in Journal of The Arnold Arboretum, in 1937, in volume 18, issue 4, pages 360

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Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 4, pages 461

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Published in Journal of The Arnold Arboretum, in 1933, in volume 14, issue 4, pages 425

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Published in Journal of The Arnold Arboretum, in 1946, in volume 27, issue 4, pages 510

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Published in Journal of The Arnold Arboretum, in 1935, in volume 16, issue 4, pages 469

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Published in Journal of The Arnold Arboretum, in 1949, in volume 30, issue 4, pages 456

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Published in Journal of The Arnold Arboretum, in 1953, in volume 34, issue 4, pages 417-425

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Published in Journal of The Arnold Arboretum, in 1954, in volume 35, issue 4, pages 381

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Published in Journal of The Arnold Arboretum, in 1945, in volume 26, issue 4, pages 499

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Published in Journal of The Arnold Arboretum, in 1962, in volume 43, issue 4, pages 460

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Published in Journal of The Arnold Arboretum, in 1963, in volume 44, issue 4, pages 522

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Published in Journal of The Arnold Arboretum, in 1947, in volume 28, issue 4, pages 453

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Published in Journal of The Arnold Arboretum, in 1955, in volume 36, issue 4, pages 431

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Published in Madroño, in 2007, in volume 54, issue 2, pages 204

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Published in Madroño, in 2007, in volume 54, issue 2, pages 206-208

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Published in Journal of The Arnold Arboretum, in 1935, in volume 16, issue 3, pages 358-363

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Published in Journal of The Arnold Arboretum, in 1930, in volume 11, issue 2, pages 63-119

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Published in Journal of The Arnold Arboretum, in 1942, in volume 23, issue 4, pages 509-519

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Published in Journal of The Arnold Arboretum, in 1945, in volume 26, issue 4, pages 484-495

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Published in Journal of The Arnold Arboretum, in 1947, in volume 28, issue 4, pages 447-450

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Published in Journal of The Arnold Arboretum, in 1943, in volume 24, issue 4, pages 488-497

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Published in Journal of The Arnold Arboretum, in 1946, in volume 27, issue 4, pages 486-507

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Published in Journal of The Arnold Arboretum, in 1950, in volume 31, issue 4, pages 430-432

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Published in Journal of The Arnold Arboretum, in 1936, in volume 17, issue 4, pages 357-366

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Published in Journal of The Arnold Arboretum, in 1938, in volume 19, issue 4, pages 446-457

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Published in Journal of The Arnold Arboretum, in 1937, in volume 18, issue 4, pages 349-357

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