Chloroplast poorly discoid or a flattened plate. Pyrenoid present in a few cells. Cell wall up to 1 μm in thickness.  
  Part of: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176.