Pollen grain of Ageratina altissima

Licence: 
Creative Commons Licence
Creator: 
Gretchen Jones @ http://pollen.usda.gov/index.htm
Taxonomic name: 
Ageratina altissima (Taxonomy)
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith