Cranberry

The evergreen dwarf shrub grows up to 30 cm high. It flowers in June/July and the small, up to pea-sized, red, shiny fruits develop in late summer. Lingonberries are used to make juices and jams or as a garnish for game dishes.

The dried leaves(Vitis idaeae folium) of the lingonberry are used phytotherapeutically.

The fruit itself, the lingonberry (Vitis idaeae fructus), is said to have an astringent effect due to the tannins it contains.
In empirical medicine for diarrhea, lung and uterine bleeding. No evidence of efficacy.

Ingredients:

Tannins, catechin and epicatechin. Phenolic compounds: arbutin, hydroquinone, pyroside, salidroside, hydroquinone pentiobioside.
Flavonoids, caffeic acid, p-coumaric acid, p-hydroxybenzoic acid, ferulic acid, gentisic acid, salicylic acid, as well as triterpenes, oleanolic acid and ursolic acid.

1. https://arzneipflanzenlexikon.info/ cranberry.php
2. https://www.awl.ch/heilpflanzen/vaccinium_vitis_idaea/preiselbeere.htm