Syringa meyeri , Meyer Lilac, grows 4 to 8 feet tall, and 6 to 12 feet wide forming a dense, broad-mounded shrub. They emerge before plants are fully leafed out, usually early to mid-May. This species is not affected by powdery mildew as are many other species. Syringa microphylla is commonly known as the littleleaf lilac. The plant grows 6 feet tall and 9 to 12 feet wide.
Flowers are rosy lilac in color.
The variety 'Superba' has single deep pink flowers. Syringa patula , the Manchurian lilac, has an upright form and grows 9 feet tall. The flower panicles often occur in pairs from the terminal buds of last years growth. They are 4 to 6 inches long with lilac purple flowers and appear in late May to June. Syringa reticulata , the Japanese tree lilac, grows 20 to 30 feet tall with a spread of 15 to 25 feet forming an oval to rounded-shaped small tree.