The present work comprises a detailed ecological study on Cynanchum acutum L. growing in two different. Phytogeographical regions, including vegetation analysis of ten stands representing Cynanchum community type at each of the Deltaic Coast and the Isthmic Desert. Synthetic caracters of Cynanchun community was studied in details twenty six associate species belong to 13 families were recarded Cynanchum community type of Deltaic Coast. Atriplex semibaccata, phragmites australis, Pancratium maritimum and Halocnemum strobilaceum were common perennial associates while Mesembryanthemum crystallinum, Richardia tingitana and Senecio glaucus were the common annuals. The floristic components of this community differentiated into 15 perennials 12 annuals. Seven life-forms were recognized and Therophytes, Helophytes, Cryptophytes and Geophytes were the main types. The plant assemblage belongs to 7 chorotypes: Mediterranean, Irano-Turanian, Saharo-Arabian, Euro-Siberian and Pantropical. Phyochemically, the proximate constituents and nutitive values of the two ecotypes of C. acutum of Deltaic Coast and Isthmic Desert as well as the secondary metabolic products including protein amino acids, fatty acids, antioxidant compounds (phenols, flavonoids, anthocyanins and ascorbic acid) and their activities, total carbohydrates, tannins, alkaloids, saponins were quantifid and mineral nutrients were in shoots of the two Cynanchum ecotypes in Deltaic Coast and Isthmic Desert regions. This perennials herbaceous twiner plant prevailing soil laomy textured, non-saline, fertile and slightly alkaline. Nutritive value C. acutum ecotype of Deltaic Coast higher (505.95 kcal/100g) than the Isthmic Desert ecotype (470.18 kcal/100g dry wt.). Seventeen amino acids were detected in aerial parts of the two ecotypes. Also, both the two plant of two habitats showed antioxidant activities.

doi.org/10.32737/0005-2531-2026-2-40-49