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A Lulav with wrinkles:<a href="#ftn1" name="ftnref1">[1]</a>
If the spine contains needles or if the Lulav is wrinkled it is invalid.<a href="#ftn2" name="ftnref2">[2]</a>
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<a href="#ftnref1" name="ftn1">[1]</a> 645/18
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<a href="#ftnref2" name="ftn2">[2]</a> Regarding the definition of wrinkles see Kashrus Daled Minim p. 96 which says if the tips are wrinkled it is invalid. However in Piskeiy Teshuvos&nbsp; 645/12 he argues that this is not the meaning.
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Shulchan Aruch HaRav | A Lulav with wrinkles

A Lulav with wrinkles:[1] If the spine contains needles or if the Lulav is wrinkled it is invalid.[2] [1] 645/18 [2] Regarding the definition of wrinkles see Kashrus Daled Minim p. 96 which says if the tips are wrinkled it is invalid. However in Piskeiy Teshuvos 645/12 he argues that