plural noun

• A class of lower plants that comprises the brown algae.

  Class Phaeophyceae, division Heterokontophyta (or phylum Heterokonta, kingdom Protista); formerly division Phaeophyta

  ‘For marine plants, the argument would be different if we accepted the limited overnight acid accumulation in the Phaeophyceae as CAM, in view of the large biomass production of kelp.’

  More example sentences

  • ‘Phaeophyceae, or giant kelp, is a brown algae that is generally found in a costal, temperate, marine environment.’
  • ‘There have been known several methods for preparing alginic acid or its alkali salts from the Phaeophyceae.’