Species lilies, also known as wild lilies, are some of the most elegant of all lilies and provide a natural, even nostalgic look to gardens. They can also be somewhat unpredictable, with some blooming during their first season and others taking a year or even two before flowering for the first time. But with each passing year, they will multiply and spread to put on a more glorious show than the year before. Species lilies combine well with other perennials and annuals in mixed borders.