'Tree' in the Bible

Saul was staying in the outskirts of Gibeah under the pomegranate tree which is in Migron. And the people who were with him were about six hundred men,

Then Saul heard that David and the men who were with him had been discovered. Now Saul was sitting in Gibeah, under the tamarisk tree on the height with his spear in his hand, and all his servants were standing around him.

They took their bones and buried them under the tamarisk tree at Jabesh, and fasted seven days.