The name is given in honor of Johannes Heinrich Ursinus (1608–1667), a botanist from Germany who was the author of Arboretum Biblicum.
Ursinia is a symbol of innocent love.
The recent research shows that some plants (including Ursinias) use a trick of physics, an optical effect to attract the pollinators such as bees.
Bees have a preference to the color blue, but it’s hard for plants to make that color in their petals so they produce ethereal halos of blue light around their petals, visible to bees.
In other words, the plants are using disorder to generate a specific color in order to attract pollinators, which is an interesting fact from an evolutionary point of view.