“Flag” From Boyd’s Bible Dictionary:
(fluttering). Embraces many water plants (Ex. 2:3-5; Isa. 19:6).
“Meadow” From Boyd’s Bible Dictionary:
(mead). Water-plant, flag (Gen. 41:2). Cave (Judg. 20:33).
Concise Bible Dictionary:
1. achu, a soft reed that can only grow in moist ground: it is eaten by cattle (Job 8:11).
2. suph, a weed that grows on the banks of the Nile, among which Moses in the ark was laid (Ex. 2:3, 5; Isa. 19:6).
Cyperus Papyrus—Reeds that Grow Along the Nile
Cyperus Papyrus
Strong’s Dictionary of Hebrew Words:
Meaning:
of uncertain (perhaps Egyptian) derivation; a bulrush or any marshy grass (particularly that along the Nile)