Herman Johannes Lam (3 January 1892 in Veendam – 15 February 1977 in Leiden) was a Dutch botanist.
[1] Lam studied at Utrecht University, where he was awarded a Doctor of Biology in 1919.
Lam was the appointed the director of the Rijksherbarium in 1933.
[2] He was member of the Royal Netherlands Academy of Arts and Sciences since 1960.
[1] In 1957, botanist Steenis published a genus of plants from New Guinea (belonging to the family Bignoniaceae) as Lamiodendron, in his honour.