Common Pollen Types at Eagle Lake

 

 

 

 

Poaceae or Gramineae (grasses)

  • monoporate (pore
    with distinct annulus)
  • spheroidal shape
  • psilate/scabrate/weakly verrucate
     

Cyperaceae (sedges)

  • inaperturate or peripor(oid)ate
  • grains pear-shaped
  • scabrate-verrucate
  • 3 lateral poroids and 1 poroid on broad end
 
     

Asteraceae (subfamily Liguliflorae)

  • tricolporate
  • echinate
  • exine structure consisting of lacunae separated by echinate ridges in a geometrical pattern
     

Asteraceae (subfamily Tubuliflorae)

  • tricolporate
  • echinate
  • exine without lacunae or ridges
  • spines >1.5 µm
  • polar area small
     

Artemisia (sages)

  • tricolporate
  • psilate-scabrate
  • spheroidal
  • no equatorial thickening of endexine
  • exine thick (3-4 µm) but thinning towards colpus
  • columellae distinct
  • micro-echinategrain 18-30 µm
 
     

Cornus canadensis (bunchberry)

  • tricolporate
  • psilate
  • prolate
  • pore not circular
  • pore not elongated but characterized by a constriction of the colpus
  • grain 18-25 µm
   
     

Thalictrum (western meadowrue)

  • periporate
  • psilate
  • spheroidal
  • pore not distinctly annulate
  • pore margin indistinct
  • 6-12 pores
  • 15-30 µm
     

Valeriana sitchensis (sitka valerian)

  • tricolpate
  • small scattered spines
  • visible columellae holding up the tectum of the ektexine
  • colpus membrane is ruptured in most and bears verrucate elements on the thing surface
 

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GLOSSARY