From Wikipedia: Henna, in the Bible, is Camphire, and is mentioned in the Song of Solomon.
“My Beloved is unto me as a cluster of Camphire in the vineyards of En-Gedi” Song of Solomon 1:14
Henna was grown as a hedgerow around vineyards to hold soil against wind erosion. A henna hedge with dense thorny branches protected a vulnerable, valuable crop such as a vineyard from hungry animals. The hedge, which protected and defended the vineyard, also had clusters of fragrant flowers.
Christ Jesus, You are a hedge of protection around those who love You. May the courtroom be filled with the pleasant aroma of Christ, as a cluster of camphire in the vineyards of En-Gedi. Amen.