(City flowers in 4 cities - Xining, Hohhot, Harbin, Shizuishan) Scientific name Syringa spp. Scientific name Lilac Alias ​​hundred knot, lover, lilac family name Oleaceae Morphological characteristics deciduous shrubs or small trees. Winter buds are ovate and scaly. Leaves opposite, elliptic or lanceolate, petiolate, entire or sometimes divided, rarely pinnately compound. Flowers bisexual, terminal or lateral conic sequence, corolla funnel-shaped, 4-lobed, white, purple, magenta, and blue. Flowering April - June. Capsule oblong, smooth or with ridges, back color. Flowering April - June. Capsule oblong, smooth or geniculate, cleft back.