Table 1.

Qualitative phytochemical analysis of the investigated plants.

Test	Plant
	Calendula triptero-carpa	Centarea sinaica	Centarea pseudosinaica	Koelpinia linearis	Plectranthus arabicus	Plectranthus asirensis	Tripleuro-spermum auriculatum
Sterols and/or triterpenes	+	+	+	+	+	+	+
Cardinolides	−	−	−	−	−	−	−
Carbohydrates and/or glycosides	+	+	+	+	+	+	+
Flavonoides	+	+	+	+	+	+	+
Tannins	+	+	+	+	+	+	+
Saponins	−	−	−	−	−	−	−
Anthraquinones	+	+	+	+	+	+	+
Alkaloides and/or nitrogenous bases	+	+	+	+	±	±	+
Protein and/or amino acids	+	+	+	+	+	+	+

(+) present, (−) absence, (±) trace.