Reference for Chullin 254:22

עץ בעלמא הוא

If both they and their stems dried up, it is obvious;<span class="x" onmousemove="('comment',' For even with regard to the laws of Sabbath these vegetables would be regarded as plucked, consequently only these do not convey food uncleanness, since they are as wood, but other vegetables do. Hence it was unnecessary for the Baraitha to state these obvious rules.');">¹¹</span>

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