LSJ
ἡ, a synonym (perh. a variety) of σπάρτος, used for cordage or tackle, Moschio ap. Ath. 5.206f; — written λευκέα in BGU 544.5 (ii AD), Artem. 3.59 (who dists. it from κάνναβις), Hsch. = λεύκη II. 1, λευκαίας στέφανος IG 12(1).155 iii 79, iv 118; — hence Λευκαῖος Ζεύς, Zeus of the white poplar, Paus. 5.5.5.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)