The word(s) "tree" appears 37 time(s) in 35 verse(s) in Quran in Mohsin Khan translation.

(21) He Who produces for you fire out of the green tree, when behold you kindle therewith.

(22) Is that (Paradise) better entertainment or the tree of Zaqqum (a horrible tree in Hell)?

(23) Verily, it is a tree that springs out of the bottom of Hell-fire,

(24) Verily, the tree of Zaqqum

(25) Indeed, Allah was pleased with the believers when they gave the Bai'ah (pledge) to you (O Muhammad صلى الله عليه وسلم) under the tree: He knew what was in their hearts, and He sent down As-Sakinah (calmness and tranquillity) upon them, and He rewarded them with a near victory.

(26) Near Sidrat-ul-Muntaha (a lote-tree of the utmost boundary over the seventh heaven beyond which none can pass).

(27) When that covered the lote-tree which did cover it!

(28) And the herbs (or stars) and the trees both prostrate themselves (to Allah - See V.22:18) (Tafsir Ibn Kathir)

(29) (They will be) among thornless lote-trees,

(30) And among Talh (banana-trees) with fruits piled one above another,