- M******, Captain
- M, Alexander
- M, Lago
- M. & M. Seed Co.
- M. & N. Hanhart (Firm)
- M. A. Reinhardt (Firm)
- M. Barnes & Co.
- M. Butterfield (Firm)
- M. C. Buteyn and Sons.
- M. C. Ochsner (Firm)
- M. Crawford & Son
- M. Crawford (Firm)
- M. Crawford Company.
- M. Cushman & Co.
- M. Cushman & Company.
- M. D. Roberts (Firm)
- M. H. Harman Company.
- M. H. Lynch (Firm)
- M. Hoffman,
- M. Keppler (Firm)
- M. Klitgord (Firm)
- M. Markland (Firm)
- M. Monro, Anna
- M. O'Keefe, Son & Co.
- M. Scott, Chad
- M. Thomas & Sons Auctioneers.
- M. van Waveren & Sons.
- M. Wood & Sons,
- M., E
- M., Francisco Pacheco
- M., H. I.
- M., M. K.
- M., Nellie C.
- M., R. C.
- M., Review By: W E
- M., Review By: W G
- M., W
- M.A. Hunt (Firm)
- M.A. Wallace (Firm)
- M.B. Bateham & Co.
- M.B. Faxon Company.
- M.C. Lanier (Firm)
- M.D. & C.G. Vohland (Firm)
- M.E. Akers Seed Company.
- M.E. Gillett (Firm)
- M.F. and C.C. Wright (Firm)
- M.F. Wright & Daughter.
- M.F. Wright (Firm)
- M.G. Ellmore (Firm)
- M.G. Madson Seed Co.
- M.G. Tyler (Firm)
- M.H. Brunjes & Sons.
- M.H. Harman Company.
- M.H. Lahrmann (Firm)
- M.H. Reed Seed Company,
- M.H. Walsh (Firm)
- M.I. Branch (Firm)
- M.J. Graham (Firm)
- M.J. Lynch (Firm)
- M.J. Moniz (Firm)
- M.J. Wragg Nursery Company.
- M.J. Yopp Seed Co.
- M.L. Bean Museum.
- M.L. Carr's Sons.
- M.L. Culver & Son.
- M.L. Taylor Nursery Co.
- M.M. Dillon Limited.
- M.M. Hevener & Sons.
- M.N. Borgo (Firm)
- M.N. Williamson (Firm)
- M.O. Dantzler (Firm)
- M.O. Howe (Firm)
- M.R. Jackson (Firm)
- M.S. Perkins & Company.
- M.S. Pryor (Firm)
- M.S. Rodrigues, Juliana
- M.T. Shoesmith & Co.
- M.T. Thompson (Firm)
- M.T. Young (Firm),
- M.V. Caldwell (Firm)
- M.V. Landmann (Firm)
- M.W. Hitchcock (Firm),
- M‘lachlan, Robert
- M’clelland, John
- M’leod, D
- Ma, Andrew
- Ma, Ao
- Ma, Cang
- Ma, Changgeng.
- Ma, Chong-Bo
- Ma, Chopo
- Ma, Chunhong
- Ma, Chun-Yan
- Ma, Dai-Kun
- Ma, Dezi, Liu Huilan & Hu Fuxiu.
- Ma, Fangzhou
- Ma, Hai-Jun
- Ma, Hai-Xia
- Ma, Hong
- Ma, Hui
- Ma, Hui-fen
- Ma, Huiqin
- Ma, Hu-Sheng
- Ma, J. L.
- Ma, Jian
- Ma, Jian
- Ma, Jian
- Ma, Jianhui
- Ma, Jifan. 马积藩
- Ma, Jimeng
- Ma, Jingneng & Liu Xiaoping.
- Ma, Jinshuang
- Ma, Jishun
- Ma, Keping
- Ma, Lanqing
- Ma, Li
- Ma, Liang
- Ma, Libin
- Ma, Li-jun
- Ma, Lin
- Ma, Ming
- Ma, Ning
- Ma, Peng-Fei
- Ma, Qing
- Ma, S. C.
- Ma, Shan En
- Ma, Shijun.
- ma, shiyun
- Ma, Shun
- Ma, Shun
- Ma, Shunxin
- Ma, Tao
- Ma, Tian
- Ma, W. K.
- Ma, Waisum,
- Ma, Wen
- Ma, Wen-Li
- Ma, Xiaoya
- Ma, Xi-Juan
- Ma, Xingtao
- Ma, Xueping
- Ma, Y. S.
- Ma, Y.-X.
- Ma, Yan Yan
- Ma, Yan-Bo
- Ma, Yao
- Ma, Yingxue
- Ma, Yi-Tong
- Ma, Yi-Tong
- Ma, Yonghong
- Ma, Yong-Peng
- Ma, Yueping
- Ma, Yunfei
- Ma, Yunlong
- Ma, Zhenxia
- Ma, Zhen-Xing
- Ma, Zhijun
- Ma, Zhi-Yao
- Ma, Zhonghui
- Ma, Zongqi
- Ma, Zuli.
- Maa, T C
- Maack, R.
- Maag, G W
- Maag, Johann Heinrich.
- Maag, Johann Nepomuk, ca. 1724-1800
- Maák, István Elek
- Maamouri, Anne-Luise
- Maamouri, Kalthoum
- Maanda, MQ
- Maar, Vilhelm, 1871-
- Maargaard, Lars
- Maas Geesteranus, R A
- Maas, ACS
- Maas, Bea
- Maas, E. F.
- Maas, E. V. (Eugene Vernon), 1936-
- Maas, Elizabeth
- Maas, G E
- Maas, Hiltje
- Maas, Otto, 1867-1916
- Maas, Paul J. M., 1939-
- Maas, Pay
- Maas, Philip
- Maas, Sibylle
- Maaskamp, Frans
- Maasri, Alain
- Maass, Alfred, 1863-
- Maass, B
- Maass, B L
- Maass, Jose Manuel
- Maass, Manuel
- Maass, Wolfgang
- Maassen, J. Peter, 1810-1890
- Maassen, P
- Maassen, T
- Maassoumi, Ali-Asghar
- Maas-Van De Kamer, Hiltje
- Maas-van de Kamer, Hiltje 1941-
- Maat, A Ter
- Maatschappij van nijverheid, Haarlem.
- Maazi, Mohamed-Chérif
- Mabberley, David J 1948-
- Mabberley, David John 1948-
- Mabbott, Douglas Clifford, 1893-1918
- Mabbott, Paul
- Mabbott, Paul R
- Mabeau, S
- Mabee, Todd J
- Mabee, William B. (William Bruce), 1897-1985
- Mabel L. Franklin (Firm)
- Mabel Martens, Irmgard Sandra
- Mabel Stacey Bliss (Firm)
- Mabel Suvires, Graciela
- Maberly-Oppler, G. E.
- Mabery, Charles F
- Mabey, Abigail L.
- Mabidi, Annah
- Mabie, D W
- Mabie, Hamilton Wright, 1846-1916
- Mabil, Luigi, 1752-1836
- Mabilde, Adolfo P.
- Mabillard, John E
- Mabille, Jules, 1831-1904
- Mabille, L
- Mabille, P. (Paul), 1835-1923
- Mabragaña, Ezequiel
- Mabre-Cramoisy, Sébastien,
- Mabry, Makenzie
- Mabry, T J
- Mabry, Tom J
- Mac Conraoi, Tomás
- Mac Gillavry, Donald, 1869-1951
- Mac Intyre, Giles Ternan
- Mac Intyre, Pamela A
- Mac Nally, Ralph
- Mac Nally, Ralph C
- Mac, Michael J.
- Mac, Thong
- Mac, Thuong K
- Macadam, Craig R
- MacAdam, David H.
- MacAdam, George.
- Macadam, James
- Macadam, John
- Macadam, Robert K.
- Macagnan, Cátia Regina
- Macagnan, Tomas André
- Macaire, Isaac-François, 1796-1869
- Macali, Armando