What is "whitewood bark"

Canella \Ca*nel"la\ (k[.a]*n[e^]l"l[.a]), n. [LL. (OE. canel, canelle, cinnamon, fr. F. cannelle), Dim. of L. canna a reed. Canella is so called from the shape of the rolls of prepared bark. See Cane.] (Bot.) A genus of trees of the order Canellace[ae], growing in the West Indies.

Note: The principal species is Canella alba, and its bark is a spice and drug exported under the names of wild cinnamon and whitewood bark.