Table 2. Preliminary phytochemical screening of H. formicarum tuber

Chemical constituents	Name of the tests	Ether extract	Ethanolic extract	Water extract
Alkaloids	Mayer’s test, Dragendoff’s test	-	-	-
Amino acids	Na2CO3 test	+	+	+
Cardiac glycosides	Raymond’s test, Xanthydrol test	-	-	-
Coumarins	Fluorescence test	-	-	-
Fats	Stain test	-	-	-
Flavonoids	Shinoda test	+	+	+
Reducing compounds	Fehling’s test	+	+	+
Saponins	Foam test	+	+	+
Tannins	Gelatin test, Ferric chloride test	-	+	+
Triterpenoid	Salkowski test	+	-	-
Result: + refers presence and - refers absence