Vervain mallow, Malva alcea Family: Malvaceae Pollen grain morphology: baculate, periporate, spheroidal, spiniferous Pollen grain size: 110.23 µm by 109.42 µm April 30, 2015Malvaceae, Uncategorizedbaculate, greater musk-mallow, hollyhock mallow, mallow, Malvaceae, periporate, spiniferous, vervain mallow