Matthew Poole and continuators on Job 30:4

4. Who cut up mallows by the bushes , and juniper roots for their meat.

Or, Purslain, or Salt, or bitter herbs, as the word seems to import, which shews their extream necessity.

Or, by the shrubs, nigh unto which they grew. Or, with the barks of trees, as the Vulgar Latine renders it.

Possibly the word may signifie some other Plant, for the Hebrews themselves are at a loss for the signification of the Names of Plants.