Faith_Pineo_05_Helianthus Published June 7, 2018 at 756 × 1008 in The Language of Flowers: A Maine Garden ← Previous / Next → Perennial Sunflower (Helianthus) – Stunning in the late summer garden, perennial sunflowers quickly multiply each year and are easy to grow. In the language of flowers, they mean “long life,” “loyalty” or “love in friendship.”