دراسة تشريحية مقارنة لبعض نبات العائلة (Polygonaceae)‎ في العراق

الملخص EN

Detailed of anatomical study of stem and petiole of (3) species of Atraphaxis L.

, (2) species of Calligonum L.

, (1) spicies of Eme Neck., (1) species of Fagopyrum Mill .

, (1) species of Oxyria Hill.

, (2) Species of Pteropyrum Jaub.

& Spach .

and (1) species of Rheum L. Present in Iraq were described. The result showed that the anatomical characters of the stem such as stem outline, number of vascular bundles, size of pith, chlorenchyma, collenchyma and sclerenchyma tissues are of considerable taxonomic value at the specific or generic level and can be used for taxa separation. The number of vascular bundles of petioles appeared vaiable between 6 to 8 in most species except Pteropyrum neoanum Boiss.

ex. Meisner which contain one central vascular bundle surrounded by complete ring of tanniferous cells.

All the petiols of species examined have large numbers of drusses crystals except Fagopyrum esculentum Moench .