[Pollinator] pollen guide

[Katy Lustofin]

One of my students is collecting bees this summer and would like a good 
identification guide for the pollen that she is finding on them.  Does 
any one have a good (preferably visual) guide to pollen in North America 
that they can recommend?

Thanks!
Katy Lustofin

-- 
Dr. Katy Lustofin
Marietta College
Department of Biology and Environmental Science
215 Fifth Street
Marietta, OH 45750
Office: 261B Bartlett
Phone: 740-376-4745
Fax 740.376.4753
katy.lustofin at marietta.edu