The Science of Trillium

• Shape is spherical
     
  
• Diameter is 20 - 30 um
     
  
• Wall is inaperturate (no aperture)
     
  
• Exine is unstratified and ultra-thin
     
  
• Exine Surface ornamentation
  There are 5 types across 17 species examined:
  • echinate
  • corrugate
  • granulate
  • verrucate
  • spinulate
  
     
  

Data from: M. Takahashi. 1982. "Pollen Morphology in North American Species of Trillium." American Journal of Botany, vol. 69, pp. 1185-1195.

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