Urinary tract

The white willow (Salix alba), also known as the "white willow" in English, is a common tree in the Netherlands. The bark of the willow naturally contains salicin, a glycoside identified as early as 1828 by the German pharmacist Johann Andreas Buchner.
The white willow is valued for its long history of use and is botanically interesting for its characteristic leaves and growth habit.

Woddruff Sweet (Galium aparine) belongs to the star-leaved family (Rubiaceae). This plant is known for its ability to cling to objects it comes into contact with, thanks to the numerous hooks on both the stem and fruits. This causes plants and fruits to get caught in the fur of animals, resulting in widespread dispersal over great distances.
Cleaver leaves are widest above the middle and have one central vein. They grow together in whorls of seven. These leaves also have hooks, albeit less than the rest of the plant. The stem is thickened at the tips.

Yarrow (Achillea millefolium) is a herbaceous plant in the daisy family (Asteraceae). It is a hardy perennial species common in the Netherlands and other parts of Europe. The plant is recognizable by its finely divided, feathery leaves and small flower heads, which are usually white but sometimes have a light pink tinge.
Yarrow has a long history and has been described in botanical and historical sources for centuries. The plant is named after the Greek hero Achilles, who, according to tradition, used yarrow, contributing to the herb's fame in classical antiquity.

Single herbal tincture made with dried herb of Achillea millefolium (Yarrow).
Yarrow (Achillea millefolium) is a herbaceous plant in the daisy family (Asteraceae). It is a hardy perennial species common in the Netherlands and other parts of Europe. The plant is recognizable by its finely divided, feathery leaves and small flower heads, which are usually white but sometimes have a light pink tinge.
Yarrow has a long history and has been described in botanical and historical sources for centuries. The plant is named after the Greek hero Achilles, who, according to tradition, used yarrow, contributing to the herb's fame in classical antiquity.

The Yellow Sweet Slover (Melilotus officinalis) is a biennial or perennial plant from the legume family (Leguminosae). Originally from Southern Europe, this plant has now spread worldwide. It is a slender, hairless plant that is frequently found along roads and on arable land, and is also found in dune areas. The lemon yellow honey clover reaches a height of 30 to 150 cm and blooms from July to October.