The genus Ornithogalum belongs to the Scilloideae subfamily within the Asparagaceae family (formerly Hyacinthaceae) and contains approx. 210 members. Some of them are commonly known as Star-of-Bethlehem. They are distributed in Europe (eg Turkey), Asia (eg Iran) and Africa (eg South Africa).
There are orange, white and multicolored flowering species, which can be 10 to 80 centimeters high.
Some of these species are poisonous and some are used in homeopathy. So shall Ornithogalum umbellatum be helpful against heartburn.
Tip: other members of the Scilloideae subfamily you can find in my plant identification project: plants & more.