'Tree' in the Bible

Saul stayed in the uttermost part of Gibeah under the pomegranate tree which is in Migron: and the people who were with him were about six hundred men;

Saul heard that David was discovered, and the men who were with him. Now Saul was sitting in Gibeah, under the tamarisk tree in Ramah, with his spear in his hand, and all his servants were standing about him.

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