Norma Etta Pfeiffer

Norma Etta Pfeiffer
Born1889
Died23 August 1989(1989-08-23) (aged 99–100)
Alma materUniversity of Chicago
Scientific career
FieldsBotany
InstitutionsUniversity of North Dakota, Boyce Thompson Institute
Thesis Morphology of Thismia americana  (1913)
Doctoral advisorJohn M. Coulter

Norma Etta Pfeiffer (1889–1989) was an American botanist who specialized in the study of lilies and Isoetes. She discovered and described the Chicago-endemic flowering plant species Thismia americana described in her doctoral thesis in 1913.