Virginia Bluebell, Mertensia virginica Family: Boraginaceae Pollen Grain Morphology: Heterocolpate, dumbbell shaped Pollen Grain Size: (equatorial) 14.5 + 0.6 µm by 8.9 + 0.4 µm April 14, 2015Boraginaceae, UncategorizedBoraginaceae, heterocolpate, Mertensia, Mertensia virginica, Virginia bluebells