A crown of thorns. — The word is too vague to enable us to identify the plant with certainty, but most writers have fixed on the Zizyphus Spina Christi, known locally as the Nebk, a shrub growing plentifully in the valley of the Jordan, with branches pliant and flexible, and leaves of a dark glossy green, like ivy, and sharp prickly thorns. The likeness of the crown or garland thus made to that worn by conquering kings and emperors, fitted it admirably for the purpose. The shrub was likely enough to be found in the garden attached to the Prætorium.
A reed in his right hand. — Here also the word is vague, and it may have been the stalk either of a sugar-cane, a Papyrus, or an Arundo. It represented, of course, the sceptre which, even under the Republic, had been wielded by generals in their triumphs, and which under the Empire, as with Greek and Eastern kings, had become the received symbol of sovereignty.
They bowed the knee before him. — We have to represent to ourselves the whole cohort as joining in the derisive homage. The term in Mark 15:19 implies a continued, not a momentary act — the band filing before the mock-king, and kneeling as they passed.