Callicarpa lamii (Chamorro: hamlag) is a plant in the mint family that is endemic to the Mariana Islands.

[8][1] Callicarpa lamii has been observed on the following Mariana islands (with date of their latest recorded observation): The indigenous CHamorro name is listed by Herman Lam as hamlatt or hamlag, which is the same name applied to the coastal species, Callicarpa candicans.

[6][19] The earliest known specimens were collected in 1887 on Pagan, with labels written in French, but the collector's name is not listed.

[8] The Marianas species was later named Callicarpa lamii by Takahide Hosokawa in 1934 or 1924[19] in the Journal of the Society of Tropical Agriculture.

[21] Raymond Fosberg made only passing reference to the genus Callicarpa in his 1960 The Vegetation of Micronesia.