Probably of foreign origin; the crocus -- saffron.
H3750. karkom
כַּרְכֹּם noun [masculine] saffron (crocus sativus) (Late Hebrew id.; and verb denominative כִּרְכֵּם; Hithpa`el grow yellow, pale; Aramaic כּוּרְכְּמָא, Arabic = κρόκος, crocus; LagGes. Abh. 58, No. 147; so also JHMordtsab Denkm. 83 f.; otherwise DHMib., who compare Sabean כמכם, Arabic = Greek κάγκαμον); — Song of Solomon 4:14; on meaning see especially LöwNo. 162.