Syringa
Alternate meaning: Lilac (color)
Template:Taxobox begin Template:Taxobox image Template:Taxobox begin placement Template:Taxobox regnum entry Template:Taxobox divisio entry Template:Taxobox classis entry Template:Taxobox ordo entry Template:Taxobox familia entry Template:Taxobox genus entry Template:Taxobox end placement Template:Taxobox section subdivision About 20-25 species; see text. Template:Taxobox end
Lilacs (Syringa) are a genus of plants, in the family Oleaceae, native to Europe and Asia. Lilacs range in size from large shrubs to small trees, 2-10 m tall. They are often grown for the panicles of white, pale pink or more generally purple flowers. The flowers grow in large clusters, and in several species have a strong and choice fragrance. Flowering starts after 80-110 growing degree days.
Lilacs are popular shrubs in parks and gardens throughout the temperate zone. The term French lilac is often used to refer to modern double-flowered cultivars.
Lilacs flower on old wood, and produce more flowers if unpruned. If pruned, the plant responds by producing fast-growing young vegetative growth with no flowers, in an attempt to restore the removed branches; a pruned lilac often produces few or no flowers for one to five or more years, before the new growth matures sufficiently to start flowering. Unpruned lilacs flower reliably every year. However, lilac bushes are prone to powdery mildew disease, which is caused by poor air circulation - so pruning may be necessary for some locations.
A pale purple colour is generally known as 'lilac' after the flower.
