luffa pollen, red and blue stained pollen grains, whole mount, 80x light micrograph

luffa pollen grain grains luffa pollen micrograph microscope photomicrograph loofah flower red blue stained fine coarse powder substance mount specimen wm entire light light stain 80x magnified magnification detail close-up plant histology microanatomy sample microscopy microsection slide micro botany botanical biology microbiology science research education isolated cut white background