title: Effect of Low Concentrations of Carbon Dioxide on Photosynthesis Rates of Two Races of Oxyria.
abstract: Alpine plants of Oxyria digyna have higher apparent photosynthesis rates at various carbon dioxide concentrations than arctic, sea-level plants of the same species. The ability to utilize carbon dioxide effectively at low concentrations may be involved in the survival of plants at high elevations.
authors.forename: W D
authors.initials: WD
authors.lastname: Billings
authors.forename: E E
authors.initials: EE
authors.lastname: Clebsch
authors.forename: H A
authors.initials: HA
authors.lastname: Mooney