Idna, Hebron area, Palestine was subject to phytosociological study through the period from March to May 2013; this area has a characteristic dry, arid, semi-arid and very little of sub-humid and locates between Mediterranean, Negev and Sinai regions. We took 237 samples of different species plants from Idna village; the absence of phytosociological studies on the area led us to run a statistical treatment on the 237 woody plant inventories. Moreover, the inventories were made following Braun-Blanquet 1979; we transformed the Braun-Blanquet species abundance-dominance values into those of Van der Maarel 1979. In the statistical treatment we obtained two large groups in the cluster: group (A), representing forests, copses and high shrublands influenced by climate (climatophilous); and group (B), representing Tamarix copses which are influenced by edaphohygrophilic. Working a great interest for Palestine. Due to the lack of phytosociological studies in this country. For the first time gets to sample and characterize the phytosociological methodology woody plant communities. The objective of this study is to obtain bioclimatic indicators to trigger sustainable agricultural development. We propose eight association plant communities such as ASL1 = association of woody plants (association one)—Pistacio palaestinae-Quercetum lokii; ASL2—Capparido sinaicae-Ceratonietum siliquae

The Coastal Coral Tree (Erythrina caffra Thunb.) produces floral nectar (FN) that serves to attract pollinating insects, but also secretes nectar from extra-floral (EFN) glands that serves to attract predatory insects, such as ants. While studies on myrmecophytes (i.e. specialized plants that attract and interact with ants) have primarily focused on interspecific evaluations of EFN chemistry, the Coastal Coral tree offers an opportunity to contrast intraspecific nectar chemistry with differing evolutionary and ecological functions. We hypothesized that the richness of (molecular) sugar species, relative concentrations, and diversity of sugars in FN and foliar EFN would diverge due to differences in the ecological role of the two types of nectar. High performance liquid chromatography with refractive index detection was used to identify the richness of sugar species (based on retention time), measure the relative concentrations, and evaluate the diversity of sugars in FN and foliar EFN secretions. We detected sugar species unique to each gland type and reported significant differences in the relative concentration of one sugar species common to both gland types. While the mean diversity index of sugars was similar for both gland types, the diversity of foliar EFN sugars was significantly more variable than that of FN sugars. The composition of FN showed little variation, and was reflective of its fundamental role in plant reproduction. Foliar EFN, however, demonstrated the variability expected of a context-dependent myrmecophyte that interacts with a facultative ant species assemblage across a mosaic of abiotic and biotic conditions.