The horsetail is hollow in the centre of its stem. Even the roots have an air body inside and thus aerate moist soil. You won't find any planar leaves in it. It is reduced to its simplest form. Nor does it produce flowers. The green (sterile) shoot is preceded in spring by a fertile stem which carries the spores and distributes them in the wind. When you touch the green stem fronds, it feels rough and bristly. This is due to the silicic acid that crystallizes on the stem and covers the whole plant. Because of its high silicic acid content, it is traditionally used to treat kidney problems.
Skin: Its extract has proven to promote wound healing, care for dry skin and strengthen the skin's protective barrier.
