Table 1. Data on the studied plant material.

Scientific name	Family	Studied organs	Harvest station			Harvest date
			Name (Municipality)	Location	Altitude (m)
Ammi visnaga (L.) Lam.	Apiaceae	Leaves, Stems, Flowers & Seeds	Bouhannak (Mansoura)	+34°88′19″	711	Jul-11
				-1°37′07″
Ammoides verticillata (Desf.) Briq.	Apiaceae	Leaves, Stems, Flowers & Seeds	Atar (Mansoura)	+34°88′51″	980	Jul-11
				-1°37′75″
Artemisia arborescens (Vaill.) L.	Asteraceae	Leaves, Stems & Flowers	Sidi Yahyia (Sidi Medjahed)	+34°46′45″	380	Jul-11
				-1°38′12″
Dittrichia graveolens (L.) Greuter	Asteraceae	Leaves, Stems & Flowers	Bouhannak (Mansoura)	+34°88′14″	725	Aug-11
				-1°36′38″
Lavandula dentata L.	Lamiaceae	Leaves, Stems & Flowers	Sidi Yahyia (Sidi Medjahed)	+34°88′14″	580	Jul-11
				-1°36′38″
Lavandula multifida L.	Lamiaceae	Leaves, Stems & Flowers	Bouhannak (Mansoura)	+34°88′51″	700	Oct-11
				-1°37′75″
Mentha piperita L.	Lamiaceae	Leaves, Stems & Flowers	Ouled charef (Maghnia)	+34 °49′57″	400	May-12
				-1°42′4″
Origanum vulgare subsp. glandulosum (Desf.) Ietsw.	Lamiaceae	Leaves, Stems & Flowers	Atar (Mansoura)	+34°88′51″	980	Jun-11
				-1°37′75″
Rosmarinus eriocalyx Jord. & Fourr.	Lamiaceae	Leaves, Stems & Flowers	Honaine	+34°88′14″	100	Jun-11
				-1°36′38″
Thymbra capitata (L.) Cav.	Lamiaceae	Leaves, Stems & Flowers	El Koudia	+34°53′59″	690	Jul-11
				-1°21′55″