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

Figure 5

Mass of seed head (grams) as function of the number of buds in a head for Potentilla gracilis (native) and P. recta (invasive), at Rice and Ham sites, northeastern Oregon, June-July, 2003.