The word(s) "trees" appears 14 time(s) in 14 verse(s) in Quran in Mohsin Khan translation.

(1) Allah has made the Ka'bah, the Sacred House, an asylum of security and benefits (e.g.Hajj and 'Umrah) for mankind, and also the Sacred Month and the animals of offerings and the garlanded (people or animals marked with the garlands on their necks made from the outer part of the stem of the Makkah trees for their security), that you may know that Allah has knowledge of all that is in the heavens and all that is in the earth, and that Allah is the All-Knower of each and everything.

(2) And your Lord inspired the bees, saying: "Take you habitations in the mountains and in the trees and in what they erect.

(3) And verily We shall make all that is on it (the earth) a bare dry soil (without any vegetation or trees.).

(4) See you not that whoever is in the heavens and whoever is on the earth, and the sun, and the moon, and the stars, and the mountains, and the trees, and Ad-Dawabb [moving (living) creatures, beasts], and many of mankind prostrate themselves to Allah. But there are many (men) on whom the punishment is justified. And whomsoever Allah disgraces, none can honour him. Verily, Allah does what He wills.

(5) Is not He (better than your gods) Who created the heavens and the earth, and sends down for you water (rain) from the sky, whereby We cause to grow wonderful gardens full of beauty and delight? It is not in your ability to cause the growth of their trees. Is there any ilah (god) with Allah? Nay, but they are a people who ascribe equals (to Him)!

(6) And if all the trees on the earth were pens and the sea (were ink wherewith to write), with seven seas behind it to add to its (supply), yet the Words of Allah would not be exhausted. Verily, Allah is All-Mighty, All-Wise.

(7) But they turned away (from the obedience of Allah), so We sent against them Sail Al-'Arim (flood released from the dam), and We converted their two gardens into gardens producing bitter bad fruit, and tamarisks, and some few lote-trees.

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

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

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