Anise
Anise seeds have a very sweet, pronounced licorice taste and contain a volatile oil, anethol, that aids in the digestion of rich foods and settles the stomach. Anise stimulates gastric juice production, relieves nausea, and is helpful for colic. It regulates digestion, making it useful for both constipation and diarrhea.

Anise is also helpful for belching, gas, bloating, vomiting, chronic diarrhea, gastrointestinal cramps, and sluggish digestion. It's a mild sedative and is useful for calming stress-related nervousness and relieving insomnia. Anise has anti-spasmodic and anti-fungal properties, and helps prevent fermentation and gas in the stomach and bowels.

Anise is available as small, black, dried seeds from spice shops or the bulk section of health food stores, and can be easily brewed into tea. Lightly crushing the seeds before brewing them with hot water will increase their strength. Whole anise seeds can also be chewed.

Caution
Generally considered safe but may have effects common to estrogenics such as headache, blood clotting, breast cancer.

Note: Japanese Star Anise is not the same herb -- it is poisonous.