Bilberry is a shrubby perennial plant that grows in the sandy areas of the northern U.S. and in the woods and forest meadows of Europe. ... The fruit is a blue-black (may be red in some areas) 5-seeded berry. Although often called huckle berry, the bilberry is more nearly related to cranberry. ... Bilberry is antiseptic and astringent. In case of diarrhea ... the leaf is an effective remedy.