CLASSIC HENNA COLORLESS HAIR CONDITIONING POWDER The product is a one-component herbal powder, which is also called "colorless henna. However, it is not actually the well-known henna plant (Lawsonia inermis), but a relative of it. Cassia Obovata is a hair conditioning herb. Perhaps it is only similar to henna , which also makes our hair shiny and healthy.However, it has no coloring effect at all when mixed with water.