The pollen morphology of Pseudocydonia, Chaenomeles and Cydonia were studied with the aid of scanning electron microscope(SEM). Pollen grains were N3 P4 C3 type according to G. Erdtman’s N. P. C system, radio symmetric prolate or rarely perprolate, with the sizes of 33.24-48.27 μm(P)×18.93- 25.58 μm(E)in Chaenomeles, 37.15-42.50 μm(P)×21.74-24.86 μm(E)in Pseudocydonia, and 36.85-43.95 μm(P)×19.63-22.83 μm(E)in Cydonia. The exine sculpture was striate in Chaenomeles and Pseudocydonia (stripes irregular in the former but nearly parallel in the latter), while nearly smooth in Cydonia. The results demonstrated that palynological characters were valuable in recognition of taxa in specific and genera level and agreed with the separation of Chaenomeles and Pseduocydonia. The pollen submicroscopic characters of six species in three genera were described, and a key was compiled for them.
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