Ukhuni iyona substance enkulu ezihlahleni. Lwakhiwe ngama xylem vessels ikakhulukazi, okuyiwona ahambisa amanzi enhla kwesitshalo. Ama substances amabili okuyiwona amakhulu kwizinkuni ngama cellulose nama lignin. Ukhuni lusetshenziselwa ukwakha izakhiwo, ifenisha, ￼￼nobuciko￼￼. Ziphinde zibase umlilo. Iphepha lenziwa ngama fibres atholakala ezinkunini. Ukhuni luyi renewable resource kodwa seliqala ukutholakala kanzima. Le-athikhili iyisigcino (isiNgisi: "a stub"). Ungakwazi ukusiza uWikipedia: ngokuyikhulisa.