The entire Areawide pest management research unit's (APMRU)
pollen reference collection was started in 1993. Within the
collection are of five types of pollen reference material:
permanent glass slides, light micrographs, scanning electron
micrographs, pollen vouchers, and field/ herbaria collected
polleniferous material. The entire collection consists of about
7500 worldwide taxa. Because of the importance of a good
reference collection, it is constantly being upgraded and new
taxa are added yearly. The pollen reference collection is
actually composed of several components, some of which are on
loan. The Stanley D. and Gretchen D. Jones, Meredith Hoag Lieux
Collection, and David and Susan Jarzen Pollen Collections are on
loan.