Boyd’s Bible Dictionary:

(reed). (Ex. 30:23, Song of Sol. 4:14, Ezek. 27:19), identified with the lemon-grass, or sweet-flag. “Sweet cane” (Isa. 43:24, Jer. 6:20).

Concise Bible Dictionary:

The word is qaneh, and is often translated “reed.” It was one of the ingredients of the holy anointing oil (Ex. 30:23). It is mentioned among a list of spices and was brought to the market of Tyre (Song of Sol. 4:14; Ezek. 27:19). It is the calamus odoratus, a reed growing in India and Arabia, and which is said to have been found in the valley of Lebanon. It has a fragrant smell, and when dried and pounded forms a valuable ingredient for rich perfumes.

Jackson’s Dictionary of Scripture Proper Names:

sweet stalk: reed