Pollination Biology of Potentilla recta (Sulfur Cinquefoil) and Its Cooccurring Native Congener Potentilla gracilis in Northeastern Oregon

Figure 4

Mass per individual seed (mg) for Potentilla gracilis and P. recta seeds produced by flower heads exclosed by bags having mesh sizes designed to exclude various sizes of pollinators, along four transects at both Ham and Rice sites, northeastern Oregon, June-July 2003.