It forms a solid support. The phloem is towards the centre, outside the xylem. Any green part of a plant above ground, where it is exposed to light, can photosynthesise. But a plant’s leaves are ...

This is the top of a chemically cleared pistil from a thale-cress flower. You can see the stigma on top of the pistil in orange (1), with several round pollen grains stuck to it (2). The transparent ...

It forms a solid support. The phloem is towards the centre, outside the xylem. Any green part of a plant above ground, where it is exposed to light, can photosynthesise. But a plant’s leaves are ...