Study of libani group of Oaks in Zagros mountains and introduce a new record of them for the flora of Iran

Oak Libani groups were belong to dentate oaks which distributed in the north of Zagros mountains(Iran). This group have two species in Iran: Quercus libani and Q. trojana. Q. trojana reported as a new speceis for the flora of Iran and distinguished by bellow characters: It is typically a small tree and easily identified by its semi-evergreen, small, subcoriaceous elongated and regularly sinuate-dentate leaves. Its nearest relative, Q. libani G. Olivier, differs from Q. trojana by its longer petioles, greater numbers of aristate teeth and bigger fruits. Quercus trojana is rather variable, especially in leaf size and shape, the number of teeth on the leaf margins and in the indumentum. Leaf hairs, if present, are stellate with (2-)3-8(-14) rays. The leaves are densely stellate-hairy on the abaxial surface.