PERIWINKLES, HYACINTHS AND LILIES
Periwinkle vines, grape hyacinths and lilies-of-the-valley are adaptable, cultivated flowering plants in the United States that have much in common. They are all planted perennials that have lovely flowers in April and spread readily from where they were planted, as if they are wild flowers. All these plants have beautiful, interesting blossoms, which is why they are abundantly planted on lawns and in flower gardens. Periwinkles, or Myrtles, for example, are a native, sprawling ground cover that helps halt soil erosion and provides shelter for small wildlife, including a large variety of invertebrates. This ground-hugging vine produces several purple blooms, each one with five petals. The bases of those petals together form a star shape in the middle of the flower they create. Each intriguing blossom resembles a one-inch pinwheel that almost seems to spi...