acalypha segetalis

Rheum palaestinum, the desert rhubarb, is a plant indigenous to Israel and Jordan with a highly developed system for gathering rainwater.The plant has broad, rigid leaves, with a waxy surface, and channels cut into them that funnel any water that drops onto them toward its root, with enough force to cause deep soil penetration. An alternative explanation for the evolution of the unique morphology of the rheum's leaf is that the wrinkled leaf has specifically developed its unique 'architecture' as ...