Search in gallery Arabidopsis pistil - Large (86 Kb) - Scroll down   to information With labels Legend: 1  ovary 3  germinated pollen grains on stigma 2  ovule   English name: Arabidopsis Scientific name: Arabidopsis Familia: Cruciferae Classis: Dicotyledonas Phylum: Angiospermae Regnum: Plantae Arabidopsis pistil. This view was taken with a fluorescence microscope. It shows blue-greenish fluorescence from aniline blue, a stain that specifically binds to callose, which is present in the wall of pollen grains and pollen tubes.

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