Table 2.

Relative concentrations of several classes of compound in P. minus.

Chemical Class of Compound	SPME Technique			Essential Oil
	% Relative Area			% Relative Area
	Leaves	Stems	Roots	Leaves	Stems	Roots
Terpenes
Monoterpenes	0.136	1.033	1.41	0.256	0.152	2.122
Sesquiterpenes	10.926	54.314	26.637	26.279	44.027	9.973
Total Terpenes	10.59	55.347	28.051	26.535	44.179	12.094
Aliphatic compounds	88.069	44.121	17.007	73.402	53.803	50.931
Organic acids	0	0.530821	54.95	0	0	34.449