What shape is lilac?

Terminal or lateral panicles, the inflorescence is 8 cm ~ 20 cm or longer; Flowers are small and fragrant, white, purple, purplish red or blue. Mostly white and purple. Purple is lavender, and white is lavender. Lilac is a variety of lilac. The capsule is rectangular and there are cracks between rooms. I like full sunshine, but I am resistant to half shade. Strong adaptability, cold tolerance, drought tolerance, barren tolerance and less pests and diseases. Appropriate use of good drainage, loose neutral soil, avoid acid soil.