Boyd’s Bible Dictionary:
Eaten as a last resort, in time of famine (2 Kings 6:25).
Concise Bible Dictionary:
Some take this in 2 Kings 6:25 to represent a kind of herb; we have plants similarly named, as cowslip, hart’s-tongue, and the Arabs have a herb they call “sparrows’ dung.”
Strong’s Dictionary of Hebrew Words:
Meaning:
in the margin for the textual reading, cheryown {kher-yone'}; both (in the plural only and) of uncertain derivation; probably some cheap vegetable, perhaps a bulbous root