Fig. 2 a in The oligolecty status of a specialist bee of South American Prosopis (Fabaceae) supported by pollen analysis and floral visitation methods

Fig. 2 a Acetolyzed pollen grains of Prosopis from nest samples, seen in light microscope at 40× magnification. b Scanning photomicrograph of pollen grains of Prosopis alba in equatorial (left) and polar (right) view, showing scabrate and punctate wall sculpture. Bars a 20 μm, b 10 μm