Small-flowered Cranesbill, Geranium pusillum Family: Geraniaceae Pollen Grain Morphology: Coarse, dense baculae and clavae, Tricolpate Pollen Grain Size: 62.4 + 2.3 µm by 61.4 + 2.4 µm January 20, 2015Geraniaceae, Uncategorizedbaculate, clavate, Geranium, Geranium pusillum, pollen, pollen grain, small-flowered cranesbill, tricolpate