Scientific name:
Method: Steam distillation
Origin:
Spearmint essential oil is known to increase metabolism, improve/stimulate appetite (used aromatically or topically), good for digestive disorders, is anti-inflammatory, antiseptic, mucolytic, a gallbladder stimulant and digestive aid.
 
 
"The difference between spearmint and peppermint is that peppermint has a bold and strong flavor that can be overpowering in recipes; spearmint has a sweeter and more mild flavor than peppermint. The difference also lies in the way that the leaves are grown; spearmint leaves tend to be bigger and lighter in color than peppermint leaves."
 
"Spearmint is a naturally occurring aromatic herb that is found in cuisines since the Roman times. It is popular for its green tea infusions that are know to relieve a wide range of aliments such as nausea, hiccups, flatulence, etc."
http://www.differencebetween.info/difference-between-spearmint-and-peppermint