Boyd’s Bible Dictionary:
(large rush). The bulrush (Ex. 2:3-5) is supposed to be the papyrus, from which paper was made (Job 8:11).
Concise Bible Dictionary:
In Exodus 2:3 and Isaiah 18:2 The papyrus is referred to, a reed of which ancient paper was made. It was of this that the ark was made in which the infant Moses was put (Ex. 2:3), and the smaller boats on the Nile (Isa. 18:2). In Isaiah 58:5 it is a different word, and is used for any kind of “rush.” Both words are also translated “rushes.”
Cyperus Papyrus – Reeds that grow along the Nile.
Cyperus Papyrus