'Tree' in the Bible

"As you continue on from there, you will come to the tall tree of Tabor. At that point three men who are going up to God at Bethel will meet you. One of them will be carrying three young goats, one of them will be carrying three round loaves of bread, and one of them will be carrying a container of wine.

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

When Saul heard that David was discovered, and the men that were with him, (now Saul abode in Gibeah under a tree in Ramah, having his spear in his hand, and all his servants were standing about him;)

And they took their bones, and buried them under a tree at Jabesh, and fasted seven days.