Arabis caucasica (often included within Arabis alpina) is a moutainours perennial herb. It blooms in Israel in April-May, forming nice, white flowering patches in the rocks.
Arabis caucasica clumps decorate the cliffs of the Mt Hermon and northward towards Turkey and the Caucasus. It is closely realted to the European Arabis alpina. At first I was frustrated that it was hidcden in the shade, but it turned out good, since the white flowers really glow in the sun.