Heart-shaped leaves of Linden Trees add a romantic whimsy to any garden. Similar to Aspen tree leaves, one side of the heart is often larger than the other side. Clusters of petite fruit produce a drupe. A part of the Tilia genus, all Linden Trees produce intoxicatingly fragrant yellow flowers from May to July, which are beloved by bees, butterflies, and hummingbirds. Many a beekeeper loves to plant lindens on their property.