Ṭūbā
Ṭūbā () is a tree which grows in Jannah (the Garden of Eden) according to Islam.

The term is mentioned in the Quran in surah ar-Ra'd, verse 29: "Those who believed, and work righteousness, Tuba is for them and a beautiful place of (final) return", as well as in several ahadith.

The female given name Tuba (also spelled Tooba or Touba) derives from the name of the tree and is widely used in the Muslim world, especially in the Arab world, Pakistan and Turkey.

Ahadith
The tree is mentioned in collections of ahadith. According to Sahih al-Bukhari,  Anas bin Malik said that Muhammad said "There is a tree in Paradise (which is so big and huge that) if a rider travels in its shade for one hundred years, he would not be able to cross it." and that Abu Hurayrah said Muhammad said: "In Paradise there is a tree in whose shade a rider could travel for a hundred years without crossing it. Recite, if you wish: ‘In shade long-extended’ [al-Waaqi’ah 56:30]"

See also
Plants in Islam
Tuba (given name), a given name derived from the tree
Touba, a city in central Senegal sometimes said to be named for the tree
Sidrat al-Muntaha, a lote tree that marks the end of the seventh heaven in Islam
Zaqqum, a tree in hell
Tree of life, an archetype in many mythologies and religious traditions

References

Islamic eschatology
Trees in mythology
Trees in Islam
Jannah
Quranic words and phrases