I remember posting an article about a new material that had been developed inspired by the water repellent leaves of Lady’s Mantle (Alchemilla spp.). Another species with very high water repellence (so-called superhydrophobicity) is the root vegetable taro (Colocasia esculenta) . Here it is demonstrating what is known as the Lotus effect on my balcony! See more at https://en.wikipedia.org/