The recent record of 2000 years old viable seed is of
The oldest 14C-dated seed that has grown into a viable plant was Judean date palm (a cultivar of Phoenix dactylifera) seed about 2000 years old, recovered from excavations at Herod the Great’s palace at Masada in Israel. It was successfully sprouted in 2005 (Sallon et al, 2008). So, the correct answer is 'Date palm'.