Boyd’s Bible Dictionary:
(sting). The stinging nettle (Isa. 34:13; Hos. 9:6). Supposedly the prickly acanthus (Job 30:7; Prov. 24:31; Zeph. 2:9).
Concise Bible Dictionary:
These are mentioned in scripture as a sign that a place was deserted and given up to desolation. In Job the poor outcasts are described as taking shelter under them (Job 30:7; Prov. 24:31; Isa. 34:13; Hos. 9:6; Zeph. 2:9).
Roman Nettles
Strong’s Dictionary of Hebrew Words:
Meaning:
or (shortened) charul {khaw-rool'}; apparently, a passive participle of an unused root probably meaning to be prickly; properly, pointed, i.e. a bramble or other thorny weed